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Night sweats: causes, warning signs & what to do
Occasional sweating at night from a warm room is normal. Drenching night sweats that soak the sheets, especially with other symptoms, deserve a look.
Common causes of night sweats
- Menopause / perimenopause
- Infections (including TB in some regions)
- Overactive thyroid
- Anxiety or low blood sugar
- Certain medicines
- Rarely, lymphoma or other cancers
When to see a doctor urgently
- Night sweats with unexplained weight loss and persistent fever — seek prompt care
- Night sweats with a new lump or swollen glands
- Coughing blood or a persistent cough
- Drenching sweats lasting weeks
Frequently asked questions
Are night sweats always serious?
No — a hot room, menopause or anxiety are common, harmless causes. But drenching sweats with weight loss, fever or lumps should be checked.
What is the link between night sweats and TB?
In regions where TB is common, drenching night sweats with a lasting cough, fever and weight loss can be a sign and should be tested.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.