Back sweating in the elderly can be a normal physiological phenomenon, but it can not be ruled out that it is caused by certain diseases, such as hyperthyroidism, diabetes mellitus, hypoglycemia, etc. When the symptoms of back sweating persist or aggravate, it should be promptly consulted and treated. 1. Physiological factors: emotional stress, increased exercise or hot weather, high room temperature, indoor temperature is too large, can lead to back sweating, is a normal physiological phenomenon. 2. Pathological factors (1) hyperthyroidism: hyperthyroidism can be due to increased secretion of thyroid hormones and lead to increased sympathetic excitability and accelerated metabolism, the patient may appear sweating, intolerance, fatigue, fatigue and other symptoms, sweating can be manifested as back, forehead and other sweating. (2) Diabetic hypoglycemia: diabetes mellitus is a metabolic disease with chronic hyperglycemia as a symptom, diabetes mellitus patients due to diet or medication when hypoglycemia occurs, sweating phenomenon can occur, which can be manifested as sweating on the back. Older people who only show back sweating, but no other abnormalities, it is usually a normal physiological phenomenon, if accompanied by other discomforts, it should be timely consultation, to clarify the cause of the disease, and actively carry out the appropriate treatment.