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Can night sweats be a symptom of MS

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Kostenloser Versand verfügbar. Kauf auf eBay. eBay-Garantie As I looked back on my life with this newfound knowledge, one such symptom that jumped out to me was night sweats. These are a common occurrence among those with MS, where we often awake in the middle of the night completely soaked by our own sweat. Waking up to soaked beddin Night sweats are not something to be worried about - although very annoying and uncomfortable, the flare up of symptoms will pass. It can help to speak to others with MS that might also be experiencing night sweats. The forum can be a great place to ask others for tips or experiences

Heavy Sweating at Night: Is It Related to MS

In addition to the many debilitating symptoms presented by MS, the leading drugs prescribed for the disease can cause multiple side effects, including hot flashes and night sweats. Our customers tend to tell us that flushing and increased anxiety can occur after administering doses of a very common (and effective) drug, Copaxone Many people with MS report this mysterious symptom of overheating at night, and even night sweats. Even though anecdotally I find this to be a fairly common symptom, there are no studies that have been done that explain this, or that really even confirm this it is a true symptom of MS. MS can cause temperature dysregulatio Night sweats is found among people with Multiple sclerosis, especially for people who are female, 40-49 old. The study is created by eHealthMe based on reports of 1,201 people who have Multiple sclerosis from the Food and Drug Administration (FDA), and is updated regularly Night sweats and hot flashes are very common among women around the time of menopause. If you are around age 50 and are having irregular or absent menstrual periods, and have no other symptoms, this is likely the cause of your symptoms. Causes shown here are commonly associated with this symptom Before you assume that MS is the cause of impaired or decreased taste, get your symptoms checked out by your doctor, as new loss of taste and smell can also be a symptom of COVID-19, among other.

In the most common form of multiple sclerosis, symptoms come and go (known as relapsing remitting MS). These symptoms can run the gamut from mild tingling to more severe vision loss MS is a disease with unpredictable symptoms that can vary in intensity. While some people experience fatigue and numbness, severe cases of MS can cause paralysis , vision loss, and diminished. But they can occur in advanced and more serious MS cases, as the muscles responsible for breathing, like those involved in speaking and swallowing, can be affected. The MS hug is a symptom. While each case of MS is unique, a particular set of symptoms is common, including: 2 1. Fatigue: Physical and mental exhaustion that isn't relieved by sleep or rest is the most debilitating aspect of MS for many people. Muscle-related symptoms: Impaired nerve communication can lead to weakness, tremor, and spasticity (involuntary tightness. For some, this began after they were diagnosed with MS, but others say they can't remember ever sweating. Several said that when they got warm, rather than sweating, their skin turned pink or..

Of course there are also the hot flashes of menopause. I'm so lucky that didn't happen to me, just the luck of the draw. I take after my mother in that regard, but I don't know who my sister takes after, as she's had night sweats for years and years post-menopause, and it's been forever since I've seen her wear a sweater or turtleneck

How to deal with night sweats when you have MS Overcoming M

Night Sweats and Multiple Sclerosis (MS) Wicked Sheets

  1. Fatigue, Muscle weakness and Night sweats. WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms fatigue, muscle weakness and night sweats including Lack of exercise, Hypocalcemia, and Multiple sclerosis. There are 82 conditions associated with fatigue, muscle weakness and night sweats
  2. There are many different causes of night sweats. To find the cause, a doctor must get a detailed medical history and order tests to decide what medical condition is responsible for the night sweats
  3. Fevers can be particularly challenging for people with MS as a fever can make MS symptoms worse. We explain what you can do to feel better. Although it is normal for body temperature to vary during the day between 36°C and 37.5°C, it is not normal for temperature to rise above 38°C (low grade fever) or even 39°C (high grade), and is usually an indication of infection
  4. Causes of night sweats and fevers include several conditions, from common infections (such as the flu) to severe illnesses (such as HIV/AIDS and various cancers). Night sweats can also be a symptom of hyperthyroidism (overactive thyroid), endocarditis (infection of the heart lining), and hepatitis (inflammation of the liver)
  5. Night sweats. WebMD Symptom Checker helps you find the most common symptom combinations and medical conditions related to night sweats. Click on the combination that matches your symptoms to find the conditions that may cause these problems. Or click on See All Conditions to see every condition related to night sweats. See All Condition
  6. Night sweats may be an early symptom of: carcinoid tumors. leukemia. lymphoma. bone cancer. liver cancer. mesothelioma. It's unclear why some types of cancer cause night sweats. This may happen.
  7. Sleep difficulties are actually more common in MS than in the general population. Sleep disturbance is a general term for a wide range of sleep-related symptoms and disorders, and can include: Difficulty with initiating or maintaining sleep, also known as insomnia. Difficulty with too much sleep, also known as hypersomnia or hypersomnolence

Temperature Regulation & MS: Overheating at Nigh

Multiple Sclerosis (MS) Multiple sclerosis or MS is an autoimmune disorder in which brain and spinal cord nerve cells become demyelinated. This damage results in symptoms that may include numbness, weakness, vertigo, paralysis, and involuntary muscle contractions. Different forms of MS can follow variable courses from relatively benign to life. Many cancers can cause night sweats, but the most common is lymphoma, which starts in parts of your body's immune system, like lymph nodes, the spleen, bone marrow, and the thymus

Multiple sclerosis and Night sweats - eHealthM

  1. Night sweats are hot flashes that happen at night, and they may disrupt your sleep. Although other medical conditions can cause them, hot flashes most commonly are due to menopause — the time when menstrual periods become irregular and eventually stop. In fact, hot flashes are the most common symptom of the menopausal transition
  2. Some common causes. In rare cases, night sweats can be a sign of an underlying medical condition, including (occasionally) cancer. But before you panic and assume the worst-case scenario, it's worth remembering that night sweats can have a wide range of different causes. Night sweats can be caused by a number of medical conditions
  3. Night sweats are a nuisance. 1  They can also be a sign of a medical condition, including a hormonal imbalance, cancer, or an infection. Symptoms that are very similar to night sweats, such as hot flashes or flushing, can also signal a medical problem. If you experience night sweats, it is important that you discuss this with your doctor

Night sweats can result from a variety of conditions, including some cancers; they can also be a side effect of certain treatments. There are steps you can take that may help better control body temperature and ease the symptoms of night sweats Signs and symptoms typically associated with night sweats depend on the underlying cause of the sweats. Associated symptoms and signs can include. flushing of the face or chest, fever, chills, headache, dehydration, mood changes, or. sleep disturbances Although a number of MS symptoms can appear early on, two stand out as occurring more often than others: Optic neuritis, or inflammation of the optic nerve, is usually the most common, Shoemaker says. You may experience eye pain, blurred vision and headache. It often occurs on one side and can eventually lead to partial or total vision loss Others have found that being on Dacogen tends to reduce the night sweats to just a couple times in a month. For some with marrow recovering after ATG, the sweats and fevers disappeared. Good luck with your search for some relief. December 17, 2011 at 11:43 am #23435. pmc357. Member

That can put a bunch of your body's processes on overdrive, leading to symptoms like night sweats, unintended weight loss, an increased appetite, a racing heart, anxiety, and more IN MULTIPLE SCLEROSIS A vision problem is the first symptom of MS for many people. The sudden onset of double vision, eye pain or blurring can be terrifying, and the knowledge that vision may be compromised makes people with MS anxious about the future. Fortunately, the prognosis is good for recovery from many vision problems associated with MS

Night sweats Causes - Mayo Clini

9 Surprising Symptoms of Multiple Sclerosis Everyday Healt

Night sweats can occur in both women and men depending upon the cause. They are common in women during the menopausal transition (perimenopause and menopause), and in men with low testosterone. Other causes of night sweats in men and women are cancers, infections, medications, low blood sugar, hormone disorders, and neurological conditions Digestive Issues like Change in Appetite, Diarrhea, Nausea, Abdominal Pain. Metallic Taste in the Mouth. Temperature Regulation or Night Sweats. Excessive Thirst and Increased Urination. You can see the variety of symptoms are quite large and can overlap with other conditions Between 60% and 80% of people with MS find that heat can cause their symptoms to worsen. This might involve a build up of fatigue, blurred vision, loss of balance or a worsening of cognitive symptoms such as concentration or memory. The effect of temperature changes on your visual symptoms is known as Uhthoff's phenomenon.. Summer weather, excessive central heating, vigorous exercise or having. Women still have hot flashes and night sweats years after menopause, a new study finds. Hot flashes and night sweats (HF/NS) are the main physical signs of the menopause, however their prevalence. iStock. Night sweats are typically an early sign of cancer, says Chun Tang, MRCGP, a general practitioner from Pall Mall Medical—but they can also be a side effect of some cancer treatments, he notes.. According to Mehmet Oz, MD, a cardiothoracic survey specialist and host of The Dr. Oz Show, there are a series of cancers that present as night sweats early on: leukemia, lymphoma, carcinoid.

Night sweats are when a person sweats excessively while they sleep. Despite the name, excessive sweating and hot flashes can occur at night or during the day. Sweating is the body's way of. Hot flashes can occur for a few months to several years. In a few rare cases, some people had hot flashes for 10 years. Other signs of hormonal imbalance include: Constipation. Heavy or irregular periods, missed periods, frequent periods, or stopped periods. Vaginal dryness and itching This increase in body temperature can lead to sweating — and night sweats are a common symptom associated with fevers. Various infections such as HIV, tuberculosis, and infectious mononucleosis can cause night sweats, Mandal says. These conditions can produce chemicals called cytokines which combat infection The MS hug is a common MS symptom that can be hard to explain, and can be mistaken for other conditions. Any pain in the chest needs checking by a doctor unless you are sure of the cause, for instance if you have already been diagnosed with the MS hug and the symptoms have not changed While night sweats are a prime suspect in the problem of poor sleep, sleep disturbances can arise from other sources. Physical causes of poor sleep include sleep apnea and other problems with breathing, digestive problems such as gastro-esophageal reflex disorder (GERD), painful conditions such as arthritis or diabetic neuropathy, and.

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Cold sweats, referred to as night sweats when they occur during sleep,are an unusual and distressing anxiety symptom. Many start to feel as though something else might be wrong, and often allow those fears to create even greater levels of anxiousness. Cause of Cold Sweats. Cold sweats can be incredibly uncomfortable Night sweats. Skin rashes. Insomnia. Estrogen/progesterone imbalance, diminishing hormones, or early menopause. Swollen and tender lymph nodes in the breast area, underarms, throat, neck, or groin. Tingling or numbness in the arms and legs. Burning pain around the chest wall or breasts. Cold and discolored hands and feet. Foul body odor. Muscle. Rheumatoid arthritis, celiac disease, systemic lupus, and multiple sclerosis all share the symptoms of night sweats, fever, and hot flashes. However, sometimes the unspecific clinical picture of the overlap of symptoms makes it challenging to establish the right diagnosis. Excessive Sweating During Pregnanc Hyperthyroidism (overactive) can cause difficulty sleeping 7 due to arousals from nervousness or irritability, as well as muscle weakness and constant feelings of tiredness. An overactive thyroid may also lead to night sweats and frequent urges to urinate, both of which can disrupt sleep

Summary: Night sweats is reported only by a few people with Iron deficiency anaemia. The study analyzes which people have Night sweats with Iron deficiency anaemia. It is created by eHealthMe based on 4 people who have Night sweats and Iron deficiency anaemia from the Food and Drug Administration (FDA), and is updated regularly Night sweats are more than just feeling hot and sweaty at night. They can be drenching sweats that can soak through pajamas and sheets. Night sweats are not only uncomfortable, but tend to interfere with your sleep, causing tossing and turning, waking you in the night, and requiring clothing and bedding changes Nocturnal hot flashes, or night sweats, disrupt sleep and, if recurrent, may contribute to insomnia. 10 These sleep disturbances can eventually lead to fatigue, irritability, poor concentration, memory problems, anxiety, and depression; a decreased quality of life may be secondary to these symptoms. 10 If hot flashes become especially.

7 Strange and Unusual Symptoms of Multiple Sclerosi

Symptoms can appear suddenly. One virus being studied for a possible connection to lupus and multiple sclerosis (MS) pain, night sweats, and fever,. MORE:Menopause magnets: what are they and do they really help ease menopause symptoms? Seven out of ten women who've undergone treatment for breast cancer experience hot flushes. 9. TB. Tuberculosis is a bacterial infection which mainly affects lungs. But as well as a persistent cough, TB can also be a trigger for hot flushes and night sweats I have this symptom for 3 months now! I had some night sweats a few times. I'm mildly anemic 10.5. This symptom won't go away for me. I eat healthy but I can't get rid of it. I have fatigue at times. My symptoms started in Mid April it was my stomach at first I didn't have an appetite then I lost a lost of weight

Multiple Sclerosis: Signs, Symptoms, and Complication

And if your nighttime headaches are associated with other symptoms such as fever, chills, night sweats, chest pain, shortness of breath, or unintentional weight loss, Dr. Rajneesh said you should. Hyperhidrosis symptoms are fairly simple to identify, but treatment of excessive sweating can be much more complex due to the many potential underlying causes. Having a professional medical doctor determine the cause and type of sweating is important in receiving the most effective treatment options Yes: Bacterial infections cause fevers which as they cycle can cause night sweats. There are other things that can, but yes, bacterial infections can too. Read More. 0. 0 comment. 6. 6 thanks. Send thanks to the doctor. Night sweats and ms. Night sweats and obesity. Night sweats and vomiting

No Sweat or Over-sweat? Regulating Body Temperature with M

Coping Strategies for Fibromyalgia Night Sweats and Hot Flashes. Temperature sensitivity can be difficult to predict and to control, but there are a few steps you can take to ease the sudden discomfort and the persistent distraction of fibromyalgia night sweats and hot flashes Not all pituitary tumors (called pituitary adenomas) cause symptoms. But when they do, they can cause many different types of symptoms. The first signs of a pituitary adenoma often depend on whether the tumor is functional (making excess hormones) or non-functional (not making excess hormones).. Functional adenomas can cause problems because of the hormones they release It can result in symptoms like hot flashes, night sweats, and excessive sweating. Nitric Oxide, Lupus, and Overheating First of all, individuals who have heat intolerance in addition to an autoimmune condition have been found to have elevated levels of nitric oxide in the body Night Sweats Treatments. Once the menopause transition passes, a woman becomes postmenopausal, and remains that way for the rest of her life. Even if you are postmenopausal, your hormones may not have completely balanced out yet. You may still experience some menopausal symptoms like night sweats, which can lead to fatigue, insomnia, and stress

So, frequent sweating can actually be a sign that your heart and arteries are in good shape. In fact, one study found that having night sweats in addition to hot flashes during menopause reduced the risk of dying from heart disease by almost 30 percent over the next 20 years. Sounds like a bearable trade-off to me As multiple sclerosis (MS) attacks the nerves, it can lead to a variety of symptoms. These symptoms, and their severity, can be different from person to person, and the ones you experience can change over time. You may also have some symptoms that are not mentioned below. The symptoms below appear to be the most common ones Night sweats can mean an infection such as tuberculosis or the flu, or it can [be a sign of] certain types of cancer such as lymphoma, Garshick said. It can also be related to hormonal changes such as menopause or due to a medication. Substance abuse and withdrawal can also lead to night sweats, she added

A fever happens mostly at night. You have no other signs of infection. You experience night sweats. Pain Pain is another symptom that can be caused by a multitude of health issues, most of which are not cancer. But persistent pain, can also hint at an underlying disease. Cancer can cause pain in different ways, including Benign night sweats. Fever can be classified as undulant, relapsing, sustained, intermittent and remitting. Low fever is 99 to 100.4 degrees, moderate fever is 100.5 to 104 and high fever is over 104 degrees. It can also be classified by its duration so it can be prolonged or brief From there, you can work with a health professional or try home remedies to eliminate the symptom. Night sweats can come about for a ton of reasons, really. Here are some of the most common

1) Vertigo and dizziness in multiple sclerosis is usually caused by a growth of an existing lesion or the appearance of a new lesion on the brain stem or cerebellum, the area in the brain that controls balance. 2) Vertigo can also be a symptom of a problem with the inner ear. Other possible causes of dizziness or vertigo include certain. Multiple sclerosis (MS) can cause a wide range of symptoms and affect any part of the body. Each person with the condition is affected differently. The symptoms are unpredictable. Some people's symptoms develop and worsen steadily over time, while for others they come and go. Periods when symptoms get worse are known as relapses The most common symptoms of CIDP are weakness, numbness, and tingling in the legs, arms, fingers, and hands. Other symptoms include fatigue, pain, balance issues, and impairment of your ability to walk.Some people have described feeling as if there were an electrical storm in their arms or legs. 1,2 Symptoms usually occur on both sides of the body at the same time

Night sweats occur when blood vessels expand, causing increased blood flow, and then contract. This causes a sudden wave of heat that spreads throughout the body, followed by sweating, reddening of the skin, and rapid heartbeat. Often, the night sweat is followed by a cold chill. Cleveland Clinic is a non-profit academic medical center Like many women, Ms Berry started to experience the symptoms of menopause in her 40s, well before menopause had actually kicked in. Hot flushes and night sweats; Problems with falling asleep. Night sweats are a common symptom of anxiety, especially chronic anxiety and panic attacks. Night sweats themselves can also cause further anxiety, fueling a cycle. Anxiety causes several physical responses that all can contribute to sweating at night. There are a few strategies that can be implemented to provide some comfort to help sleep Signs and Symptoms of Mercury Poisoning from Dental Amalgam 1 by Morton Walker, D.P.M. in his book Elements of Danger, Protecting Yourself Against the Hazards of Modern Dentistry A series of difficulties characteristic of mercury toxicity affecting the eyes. bleeding from the retina of one or both eye Last up in our CFS Symptoms Series is discussion on the flu-like symptoms, chills and night sweats, headaches and sore throat.. Dr. Jacob Teitelbaum notes in his book From Fatigued to Fantastic that: the most notorious pattern seen in severe chronic fatigue states is one in which a person who is feeling fine suddenly comes down with a brutal flu-like illness that never goes away

istockphoto Multiple sclerosis is a neurological disease that can cause a range of physical and mental problems. MS affects an estimated 400,000 Americans, mostly women. MS affects an estimated. During PEM, any ME/CFS symptoms may get worse or first appear, including difficulty thinking, problems sleeping, sore throat, headaches, feeling dizzy, or severe tiredness. It may take days, weeks, or longer to recover from a crash. Sometimes patients may be house-bound or even completely bed-bound during crashes

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Some common causes of night sweats in women There are many reasons why someone might suffer from night sweats. Night sweating could be a result of a neurological disorder, a side-effect of medication (particularly antidepressants , aspirin and some steroids) or due to a hormonal imbalance which can be triggered by pregnancy , the menopause. Meat sweats are a physical reaction some people can experience after eating large quantities of protein-rich foods, says Verona Somarriba, MS, RDN, Clinical Nutrition Coordinator for the. The Herxheimer Reaction is a short-term (from days to a few weeks) detoxification reaction in the body. As the body detoxifies, it is not uncommon to experience flu-like symptoms including headache, joint and muscle pain, body aches, sore throat, general malaise, sweating, chills, nausea, or other symptoms. This is a normal — and even healthy. A study of patients with polycythemia vera (PV) showed that the severity of individual symptoms was not affected by blood count control, with the exception of pruritus and night sweats

Hyperhidrosis/excessive sweating wth MS - Multiple

Night sweats are generally characterized by their occurrence during sleep, as well as a drenching sweat that soaks a person's night clothing and bed sheets. 1,2. Night sweats may occur along with fever and chills, two other general symptoms of blood cancer. Some types of cancer can cause fevers by releasing substances that act as toxins in the. While the classic menopause symptoms of hot flashes and night sweats can lead to disturbed sleep, it's worth noting that poor sleep quality itself is not always a direct symptom of menopause. A fever is frequently accompanied by chills and sweating. Dehydration, which can be caused by excessive drinking, can lead to headaches and night sweats. Chills and sweats are commonly associated with painkiller withdrawal. Night sweats and chills are generally no cause for alarm. Hormone fluctuations can case hot flashes Night sweats and chills may be side effects of certain medications. Illness commonly causes night sweats. Dehydration, which can be caused by excessive drinking, can lead to headaches and night sweats. Fever may trigger a bout of night sweats and chills. Night sweats and chills are generally no cause for alarm Definition of Night sweats. Night sweats: Severe hot flashes that occur at night and result in a drenching sweat. Night sweats can have many different causes, including medications, infections, and cancers

Basic symptoms: Changing sleep patterns: restlessness, night sweats, waking up two or three times a night. Feeling tired after you wake up and sleepy during the day; The 3am club: waking up between 3am - 4am and staying awake, getting by on less sleep; Periods of overwhelming fatigue (some misdiagnosed as CFS Sleep apnea night sweats are a common symptom, but in women they may be mistaken for a symptom of menopause only and not treated as sleep apnea. In fact, for both men and women, nocturnal sweating is a common symptom of obstructive sleep apnea, affecting just over 30% of men and just under 35% of women Posted 11/3/2014 6:36 PM (GMT -6) Lyme disease is far more common than people think. The night sweats is what made me think Lyme. It's a classic Lyme symptom. The symptoms you are complaining about are shared with many diseases; MS, Lyme, anxiety and more. Floaters are very common Other symptoms can include night terrors (terrible dreams where a child will cry or scream out in their sleep), bed wetting, sleep walking and others. While the child may be uncomfortable with the night sweats it is not as dangerous as say sleep walking which can have riskier consequences One of the most common causes of night sweats in women over 40 is the hormonal changes related to menopause and perimenopause. This is a very common occurrence during the menopausal transition years. While night sweats might be relatively harmless, it can also be a sign of a serious underlying disease

Night sweats occur at night, and leave the person sweaty, wanting to shed clothing. Finally hot flashes have similar characteristics as flushing and night sweats. The main difference is that although there is a total body feeling of increased temperature, there is no sweating associated it i get em- not nightly, but frequently enough. i don't sleep well to start with- and i'm not sure if i wake due to the night sweats or just me not being able to drop into REM sleep. but my sweats are accompanied by shaking, not seizure like, erm, it's tremmors kinda. but throughout my entire body. i'm in a cold sweat, and shaking and i wake suddenly at least 5 nights a week at least once a. Home » Lymphoma » Non-Hodgkin Lymphoma » Signs & Symptoms. Symptoms of lymphoma are similar to those of other diseases and afflictions. The most common symptom is a painless swelling in a lymph node (called lymphadenopathy). People often first go to the doctor because they think they have a cold or respiratory infection that will not go away Restless leg syndrome has been found to increase the risk of stroke, heart disease and kidney disease. Restless leg syndrome (RLS) is a condition that causes a person to feel an overwhelming urge. Rituxan and Ocrevus (ocrelizumab) are monoclonal antibodies used to treat multiple sclerosis (MS). Rituxan is used off-label to treat MS. Rituxan is also used in combination with other cancer medicines to treat non-Hodgkin's lymphoma, and in combination with another drug called methotrexate to treat symptoms of adult rheumatoid arthritis

Symptoms. Having a hoarse voice for more than 3 weeks is one of the most common symptoms of laryngeal cancer. Other symptoms include difficulty swallowing, weight loss, a cough that doesn't go away and shortness of breath. The earlier a cancer is picked up, the easier it is to treat it and the more likely the treatment is to be successful Norton S, Chilcot J, Hunter MS. Cognitive behaviour therapy for menopausal symptoms (hot flushes and night sweats): moderators and mediators of treatment effects. Menopause 2014 on line. doi: 10.1097/GME.000000000000009 Burning feet syndrome, also known as Grierson-Gopalan syndrome, is a set of symptoms in which the feet often become uncomfortably hot and painful. The burning sensation may become more intense at night, with some relief occurring during the day. Symptoms may range from mild to severe. The heat and pain can be limited to the soles of the feet. Night sweats are hot flashes that occur at night, associated with excess sweating that may soak nightclothes and bedsheets. Night sweats can be associated with both underactive or overactive thyroid function. However, there are numerous potential causes of night sweats, such as menopause, low blood sugar, certain drugs, or other medical conditions Hunter MS & Smith M. Managing hot flushes and night sweats: a cognitive behavioural approach to menopause, Routledge 2014. Hunter MS & Smith M. Managing hot flushes and night sweats with Group CBT: a manual for health professionals, Routledge 2015. Nonhormonal management of menopause associated vasomotor symptoms

The main symptoms of cyclic vomiting syndrome are sudden, repeated attacks—called episodes—of severe nausea and vomiting. You may vomit several times an hour. Episodes can last from a few hours to several days. Episodes may make you feel very tired and drowsy. Each episode of cyclic vomiting syndrome tends to start at the same time of day. According to the Cleveland Clinic, night sweats are repeated episodes of extreme perspiration that soaks your bedding or clothes and can be related to a medical condition. Advertisement You sweat because your blood vessels expand, which causes an increase in blood flow, and then they contract