Why does lymphoma cause night sweats?

Night Sweats is a very common presentation of Lymphoma. These sweats may be different from feeling warm under a heavy duvet: a person can wake damp, chilled, or needing to change clothes or sheets. The body can raise its internal temperature and then lower it again; sweating is one way it loses heat. Infection, hormonal changes, medicines, anxiety, and a warm bedroom can also cause sweating at night, so the symptom by itself does not identify the cause.

Make a brief note of when the sweating began, whether it is drenching, and whether it comes with fever, itching, tiredness, weight change, swollen lymph nodes, cough, or pain. Keep the room comfortably cool and drink enough fluid after a sweaty night. Arrange a medical assessment if the sweats recur or are troubling. A clinician may ask about infections, medicines, travel, and other symptoms, then decide whether an examination or tests are needed.

Seek urgent medical help for night sweats with severe breathlessness, chest pain, confusion, fainting, or a rapidly worsening illness. Seek prompt assessment for persistent fever, unexplained weight change, a new or enlarging lump, marked weakness, or repeated drenching sweats. If you are being treated for lymphoma, contact your care team promptly about a new fever or a sudden change in how unwell you feel, because infection can need timely treatment.

You could ask what other causes are being considered, whether the pattern of sweating needs blood tests or imaging, and which changes should prompt an earlier review. If you already have lymphoma, ask how to contact the treatment team outside clinic hours and whether any current medicine could contribute to sweating.