You could break into a sweat when your room feels warm or you’ve piled on too many blankets. But that’s not what we’re talking about. “Night sweats” refers to repeated drenching perspiration in the middle of the night that’s likely to wake you, and sometimes so much that you need to change your sheets. It’s usually related to a medical issue. Dealing with whatever that is may relieve the sweating.
Sweating more and being sensitive to heat are notable symptoms of hyperthyroidism. Your thyroid gland controls your metabolism, so when it makes too much hormone, your body goes into overdrive. Your body temperature rises, and you could be hungrier or thirstier, have a racing pulse or shaking hands, feel tired and out of sorts, get diarrhea, and lose weight.