The causes of summer sweating can be divided into physiological and pathological causes: physiological causes are mainly due to the high temperature in summer, the human body is in a high temperature environment, which can easily lead to the expansion of human capillaries, sweat glands secrete sweat for heat dissipation, so there will be easy sweating in summer, which is a normal physiological cause can not be ignored. The common causes of summer sweating caused by pathological reasons are thyroid disease and diabetes. Thyroid disease causes summer sweating mainly due to abnormal thyroid function, which causes sympathetic excitation and hyperactive basal metabolic rate, so that the human body is prone to excessive sweating. Diabetic summer sweating is caused by excessive blood sugar fluctuations in the body, which can cause excessive sweating in the body.