Night sweats are repeated episodes of very heavy sweating during sleep, heavy enough to soak your nightclothes or bedding. They're often caused by an underlying condition or illness.
Sometimes you may wake up after sweating heavily, particularly if you're sleeping under too many blankets or your bedroom is too warm. Although uncomfortable, these episodes aren't usually considered night sweats and aren't sign of an underlying condition or illness.
Night sweats usually happen with other concerning symptoms, such as fever, weight loss, pain in a specific area, cough or diarrhea.
Schedule a visit with your health care provider if night sweats:
- Occur on a regular basis
- Interrupt your sleep
- Are accompanied by a fever, weight loss, pain in a specific area, cough, diarrhea or other symptoms of concern
- Start months or years after menopause symptoms ended
Show References
- Papadakis MA, et al., eds. Chronic myeloid leukemia. In: Current Medical Diagnosis & Treatment 2022. 61st ed. McGraw Hill; 2022. https://accessmedicine. mhmedical.com. Accessed Jan. 10, 2022.
- Five solutions for menopause symptoms. North American Menopause Society. http://www.menopause.org/for-women/menopauseflashes/menopause-symptoms-and-treatments/five-solutions-for-menopause-symptoms. Accessed Jan. 10, 2022.
- Tefferi A. Clinical manifestations and diagnosis of primary myelofibrosis. http://www.uptodate.com/contents/search. Accessed Jan. 10, 2022.
- Smetana GW. Evaluation of the patient with night sweats or generalized hyperhidrosis. http://www.uptodate.com/contents/search. Accessed Jan. 10, 2022.
- Bryce C. Persistent night sweats: Diagnostic evaluation. American Family Physician. 2020;102:427.
- Berliner N. Approach to the adult with pancytopenia. http://www.uptodate.com/contents/search. Accessed Jan. 10, 2022.
Original article: https://www.mayoclinic.org/symptoms/night-sweats/basics/causes/sym-20050768