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Night Sweat

A night sweat, also known as nocturnal hyperhidrosis, is excessive sweating during sleep that may result in drenched sheets and sleepwear.

The occasional sweaty night is understandable particularly during summer weather, however, it is not normal to sweat a lot when you sleep.

Causes

It is firstly important to work out whether the problem is environmental or due to medical causes. Is your bedroom a comfortable temperature? Are your bedclothes or bed linen causing you to overheat?

If you have ruled out environmental causes, there may be other physical causes. See common causes of night sweats for more details.

Night sweats can be hormonal. Night sweats in men can be just as hormonal as for women.

See a health professional if night sweats:

  • Are regular
  • Interrupt your sleep
  • Are accompanied by fever or other concerns, like weight loss

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