Tidal sweating is a disorder in which excessive sweat secretion is caused by overexcitation of the sympathetic nerves. The sympathetic nerve governs sweating throughout the body, and normally the sympathetic nerve regulates body temperature by controlling sweating and heat dissipation, but sweating and facial flushing in patients with tidal sweating are completely out of normal control. The diagnosis of tidal sweating is generally based on its symptomatic manifestations to make a preliminary diagnosis, and it is recommended that patients also choose a regular hospital when diagnosing to avoid misdiagnosis. The sweating is divided into localized sweating and generalized sweating: 1. Localized sweating: often begins in adolescents with large mood swings and has a tendency to decrease naturally after the age of 25. The most common sites for localized sweating are the palmoplantar and friction surfaces, such as the armpits, groin, and perineum. This is followed by the forehead, tip of the nose, and chest. The palmoplantar sweating can be persistent or transient, caused by mood swings, without seasonal distinction, and is often accompanied by coldness or even cyanosis of the hands and feet, which can be accompanied by keratinization of the hands and feet over time. Axillary sweating can be triggered by heat or mental activity. Axillary sweating is caused by excessive activity of the small sweat glands, unlike axillary odor which is mainly caused by the sweat glands. 2, generalized sweating: mainly due to other diseases caused by generalized sweating, such as infectious hyperthermia, due to the regulation of the nervous system or oral antipyretics to sweat to dissipate heat. Other conditions such as damage to the central nervous system including the cortical and basal ganglia, spinal cord or peripheral nerves can cause generalized sweating.