{{Short description|Repeated occurrence of excessive sweating during sleep}} {{About|the medical condition|the television series|Night Sweats|the musical group|Nathaniel Rateliff}} {{Use dmy dates|date=June 2020}} {{Infobox medical condition (new) | name = | synonyms = Sleep sweats, nocturnal hyperhydrosis | field = Infectious disease, oncology | symptoms = | complications = | onset = | duration = | types = | causes = | risks = | diagnosis = | differential = | prevention = | treatment = | medication = | prognosis = | frequency = | deaths = }} '''Night sweats''' or '''nocturnal hyperhydrosis'''<ref>{{Cite web|title=Hyperhidrosis|url=https://www.ncbi.nlm.nih.gov/mesh/68006945|access-date=2020-10-29|website=MeSH - NCBI}}</ref> is the repeated occurrence of excessive sweating during sleep.<ref name=":0">{{Cite web|title=Night sweats|url=https://www.mayoclinic.org/symptoms/night-sweats/basics/definition/SYM-20050768?p=1|access-date=2020-10-29|website=Mayo Clinic}}</ref> The person may or may not also perspire excessively while awake. Hot flashes and night sweats are vasomotor symptoms, and the most common symptoms of menopause.<ref>{{cite web | last = Robinson | first = Kara | title = What Are Vasomotor Symptoms (Hot Flashes)? | work = eMedicine | publisher = WebMD | date = January 25, 2024 | url = https://www.webmd.com/menopause/menopause-vasomotor-symptoms | accessdate = 2026-02-24 }}</ref>
One of the most common causes of night sweats in women over 40 is the hormonal changes related to menopause and perimenopause.<ref>{{cite book|author1=T. F. Kruger|author2=M. H. Botha|title=Clinical Gynaecology|url=https://books.google.com/books?id=mEsPakNJWZYC&pg=PA333|year=2008|publisher=Juta and Company Ltd|isbn=978-0-7021-7305-9|page=333}}</ref> This is a very common occurrence during the menopausal transition years. Over 80% of women experience hot flashes, which may include excessive sweating, during menopause.<ref>{{Cite journal|last1=Bansal|first1=Ramandeep|last2=Aggarwal|first2=Neelam|date=January–March 2019|title=Menopausal Hot Flashes: A Concise Review|journal=Journal of Mid-Life Health|volume=10|issue=1|pages=6–13|doi=10.4103/jmh.JMH_7_19|issn=0976-7800|pmc=6459071|pmid=31001050 |doi-access=free }}</ref>
Night sweats range from being relatively harmless to a sign of underlying disease. Night sweats may happen because the sleep environment is too warm, either because the bedroom is unusually hot or because there are too many covers on the bed.<ref name=":0" /> Night sweats have been associated with a long list of clinical conditions.<ref name=":1">{{Cite journal|last1=Mold|first1=James W.|last2=Holtzclaw|first2=Barbara J.|last3=McCarthy|first3=Laine|date=November–December 2012|title=Night sweats: a systematic review of the literature|journal=Journal of the American Board of Family Medicine |volume=25|issue=6|pages=878–893|doi=10.3122/jabfm.2012.06.120033|issn=1558-7118|pmid=23136329|s2cid=24179827|doi-access=free}}</ref> However, there is very little evidence that supports clinical recommendations for this condition.<ref name=":1" />
==Associated conditions== The condition may be a sign of various disease states, including but not exclusive to the following:
*'''Cancers''' **Lymphoma<ref name="Am Fam Physician">{{cite journal|last=Viera|first=Anthony J.|author2=Bond, Michael M. |author3=Yates, Scott W. |title=Diagnosing Night Sweats|journal=American Family Physician|date=1 March 2003|volume=67|issue=5|pages=1019–1024|pmid=12643362|url=http://www.aafp.org/afp/2003/0301/p1019.html|access-date=13 June 2012}}</ref><ref name="TeitelbaumDeAntonis2004" /> **Leukemia<ref name="Am Fam Physician" /><ref name="TeitelbaumDeAntonis2004">{{cite book|author1=Jonathan E. Teitelbaum|author2=Kathleen O. DeAntonis|author3=Scott Kahan|title=In a page: Pediatric signs & symptoms|url=https://books.google.com/books?id=eugGYG5sfN0C&pg=PA6|year=2004|publisher=Lippincott Williams & Wilkins|isbn=978-1-4051-0427-2|page=6}}</ref> **Renal cell carcinoma<ref>{{cite web |title= Renal Cell Carcinoma |website= Medscape Reference |publisher= WebMD |date= 26 February 2014 |access-date= 7 March 2014 |url= http://emedicine.medscape.com/article/281340-overview#showall |last1= Curti |first1= B |last2= Jana |first2= BRP |last3= Javeed |first3= M |last4= Makhoul |first4= I |last5= Sachdeva |first5= K |last6= Hu |first6= W |last7= Perry |first7= M |last8= Talavera |first8= F |editor= Harris, JE |url-status= live |archive-url= https://web.archive.org/web/20140307024450/http://emedicine.medscape.com/article/281340-overview#showall |archive-date= 7 March 2014}}</ref> **Polycythemia vera *'''Infections''' **HIV/AIDS<ref name="Am Fam Physician" /><ref name="LeBhushan2006">{{cite book|author1=Tao Le|author2=Vikas Bhushan|title=First Aid for the USMLE Step 2 CS|url=https://books.google.com/books?id=xvrM1qV9BiMC&pg=PA74|year=2006|publisher=McGraw-Hill Professional|isbn=978-0-07-147058-2|page=74}}</ref> **Tuberculosis<ref name="Am Fam Physician" /><ref name="TeitelbaumDeAntonis2004"/> **''Mycobacterium avium-intracellulare'' infection<ref name="Am Fam Physician" /> **Infectious mononucleosis<ref name="Am Fam Physician" /> **Fungal infections (histoplasmosis, coccidioidomycosis)<ref name="Am Fam Physician" /> **Lung abscess<ref name="Am Fam Physician" /> **Infective endocarditis<ref name="Am Fam Physician" /> **Brucellosis<ref name="MayoClinicNightSweatsCauses">{{cite web | title = Night sweats : Causes | url = http://www.mayoclinic.com/health/night-sweats/MY00576/DSECTION=causes | publisher = Mayo Clinic | date = 22 March 2011 | access-date = 10 May 2012}}</ref> **''Pneumocystis'' pneumonia (most often – in immunocompromised individuals) **Omicron variant of COVID-19<ref>{{Cite web|last=Khan|first=Dr Amir|date=2021-12-20|title=Omicron is more transmissible, but is it really milder?|url=https://www.aljazeera.com/features/2021/12/20/omicron-is-more-transmissible-but-is-it-really-milder|access-date=2022-01-07|website=Aljazeera|language=en}}</ref><ref>{{Cite web| url=https://www.newstalk.com/news/luke-oneill-one-extra-symptom-now-a-sign-of-ba-5-covid-variant-1361461 |website=Newstalk |first=Jack |last=Quann |title=Luke O'Neill: Night sweats now a sign of BA.5 COVID variant |date=7 July 2022 |access-date=10 July 2022}}</ref> *'''Endocrine disorders''' **Premature ovarian failure<ref name="Am Fam Physician" /> **Hyperthyroidism<ref name="Am Fam Physician" /> **Diabetes mellitus (nocturnal hypoglycemia)<ref name="Am Fam Physician" /> **Endocrine tumors (pheochromocytoma, carcinoid)<ref name="Am Fam Physician" /> **Orchiectomy<ref name="Am Fam Physician" /> *'''Rheumatic disorders''' **Takayasu's arteritis<ref name="Am Fam Physician" /> **Temporal arteritis<ref name="Am Fam Physician" /> **Ankylosing spondylitis *'''Other''' **Obstructive sleep apnea<ref name="Am Fam Physician" /> **Gastroesophageal reflux disease<ref name="Am Fam Physician" /> **Chronic fatigue syndrome<ref name="Am Fam Physician" /> **Fibromyalgia **Granulomatous disease<ref name="Am Fam Physician" /> **Chronic eosinophilic pneumonia<ref name="Am Fam Physician" /> **Lymphoid hyperplasia<ref name="Am Fam Physician" /> **Diabetes insipidus<ref name="Am Fam Physician" /> **Prinzmetal's angina<ref name="Am Fam Physician" /> **Anxiety<ref name="Am Fam Physician" /> **Pregnancy<ref name="Am Fam Physician" /> **Menopause<ref>{{cite journal |last=Deecher |first=D. C. |author2=K. Dorries |year=2007 |title=Understanding the pathophysiology of vasomotor symptoms (hot flushes and night sweats) that occur in perimenopause, menopause, and postmenopause life stages |journal=Archives of Women's Mental Health |volume=10 |issue=6 |pages=247–257 |doi=10.1007/s00737-007-0209-5 |pmid=18074100 |s2cid=21865706}}</ref> *'''Drugs''' **Antipyretics (salicylates, acetaminophen)<ref name="Am Fam Physician" /> **Antihypertensives<ref name="Am Fam Physician" /> **Anabolic–androgenic steroids, in particular trenbolone, and the nandrolones<ref name="Am Fam Physician"/> **Dinitrophenol – a common side effect **Phenothiazines<ref name="Am Fam Physician" /> **Drug withdrawal: ethanol, benzodiazepines, cannabis, heroin (and other opioids), *Over-bundling<ref name="Am Fam Physician" /> *Autonomic over-activity<ref name="Am Fam Physician" /> *Inflammatory bowel disease (IBD) – Crohn's disease/ulcerative colitis
==References== {{reflist}}
== External links == {{Medical resources | ICD10 = {{ICD10|R|61||r|50}} | ICD9 = {{ICD9|780.8}}, {{ICD9|327}} }}
{{General symptoms and signs}}
Category:Sleep disorders Category:Medical signs Category:Menopause