Why am I sweating in my sleep?

Night sweat– a.k.a. sleep hyperhidrosis — can be caused by a variety of different factors. It can be a sign of an underlying health issue; it can also be caused by environmental factors, such as the temperature or humidity in your bedroom. Understanding why you are sweating in your sleep is important in order to address the issue and get some relief.

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The causes of night sweats

Night sweats, or excessive sweating during sleep, can be a worrisome and uncomfortable experience. In some cases, night sweats may be a sign of an underlying medical condition, or they may be the result of environmental or lifestyle factors. Understanding the potential causes of night sweats is important to determine the best course of treatment.

One of the most common causes of night sweats is menopause. During menopause, the body’s natural production of hormones, such as estrogen, decreases. This hormonal imbalance can lead to frequent hot flashes, which can cause night sweats.

Other medical conditions that can cause night sweats include thyroid disorders, infections, cancer, and sleep apnea. Environmental factors can also contribute to night sweats. Sleeping in a room that is too hot or humid can make it difficult to regulate body temperature. Wearing thick, non-breathable clothing or sleeping under too many blankets can also cause night sweats.

Certain medications, such as antidepressants, steroids, and drugs used to treat diabetes, can also cause night sweats. Alcohol and caffeine intake can also disrupt sleep and lead to night sweats. In some cases, lifestyle factors may contribute to night sweats. Stress and anxiety can cause the body to overheat during sleep, leading to night sweats.

Eating a large meal close to bedtime, or exercising too late in the evening can also raise body temperature, leading to night sweats.

If you are experiencing night sweats, it is important to talk to your doctor to determine the cause. Depending on the underlying cause, your doctor may recommend lifestyle changes, such as avoiding caffeine and alcohol before bed, or reducing stress levels. Your doctor may also recommend medications to help regulate hormones or reduce inflammation. In some cases, further testing may be needed to determine the cause of night sweats.

The role of hormones

Hormones play a crucial role in regulating many bodily functions, including sweating. When hormones are out of balance, this can lead to a wide range of symptoms, including night sweats. Hormones are chemical messengers that are produced by the endocrine system. They act as signals between cells, tissues, and organs to regulate a variety of bodily functions. The main hormones involved in regulating sweating are adrenaline and noradrenaline, which are produced by the adrenal glands. These hormones stimulate sweat glands to produce sweat when the body needs to cool down.

When hormones become unbalanced, this can affect the body’s ability to regulate sweat production. Adrenaline and noradrenaline levels may be too high or too low, which can lead to excessive sweating during the night. Other hormones, such as estrogen and testosterone, can also influence sweat production. An imbalance of these hormones can lead to night sweats. Hormonal imbalance can be caused by a variety of factors, including stress, illness, and certain medications. Menopause is another common cause of hormonal imbalance, which can lead to night sweats in women.

Additionally, certain medical conditions such as thyroid disorders and diabetes can also cause hormonal imbalances and lead to night sweats. In order to treat night sweats, it is important to identify and address the underlying cause. If the cause is a hormonal imbalance, then treatment may involve restoring hormonal balance. This can include lifestyle changes, such as reducing stress, getting regular exercise, and eating a healthy diet. Additionally, hormone replacement therapy may be recommended to restore hormonal balance.

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Controlling night sweats

To reduce night sweats, it is important to maintain a cool sleeping environment. Keep the temperature of your bedroom between 60 to 67 degrees Fahrenheit and use light sheets and blankets. Additionally, wear loose-fitting, lightweight cotton pajamas or nightgowns to help keep your body temperature regulated.

There are also some dietary and lifestyle changes that can help reduce night sweats. Avoiding stimulants such as caffeine and alcohol can help keep your body temperature regulated during sleep. Additionally, reduce your intake of spicy food and hot beverages, as these can increase body temperature and cause sweating.

Also, try to manage stress through relaxation techniques such as deep breathing, yoga, and mindfulness meditation. In addition to lifestyle and dietary changes, there are also several natural remedies for night sweats. Taking a warm bath before bed can help relax your body and reduce sweating. Herbal teas such as chamomile, lavender, and passionflower can also help reduce nighttime sweating. Eating foods that are high in magnesium, such as spinach and bananas, can also help regulate body temperature and reduce sweating.

Finally, if natural remedies and lifestyle changes do not help reduce night sweats, it is important to see a doctor for further evaluation. A doctor can determine the cause of the night sweats and provide additional treatment options.


Sweating in sleep is a natural and normal bodily response to a variety of factors, such as stress, physical exertion, and environmental temperature. In some cases, sweating in sleep can be an indication of an underlying medical condition, such as an infection, overactive thyroid, or diabetes. If you experience excessive sweating in sleep, it is important to talk to your doctor to determine the underlying cause.