People who suffer night sweats will typically wake in the night to find their bedclothes and bedding drenched, even if their bedroom temperature is cool. This abnormal sweating is annoying, but usually harmless.
However, night sweats can sometimes be a sign of an underlying medical condition, so you should see your doctor if they keep happening and you're worried.
In the meantime, you can get a better idea of the possible cause of your night sweats by reading on. However, you should not use this page to diagnose yourself with a condition – always leave that to your doctor.
The medical term for night sweats is nocturnal hyperhidrosis, which literally means 'night-time excessive sweating'.
The main conditions and medications that can cause night sweats are summarised below, although it should be noted that many of these conditions would cause other more specific symptoms as well:
There may not be an identifiable cause for your night sweats, and it may just be an annoyance that happens every now and then. When the cause is not known, it is referred to as idiopathic hyperhidrosis.
Important: Our website provides useful information but is not a substitute for medical advice. You should always seek the advice of your doctor when making decisions about your health.