Pressure and postural hyperhidrosis is the sweating response to pressure on one side of the body during position changes and lateral recumbency. It is a manifestation of hyperhidrosis. Hyperhidrosis is a disorder in which excessive sweat gland secretion is caused by sympathetic hyperexcitation. The sympathetic nerve governs sweating throughout the body. Under normal circumstances, the sympathetic nerve regulates body temperature by controlling sweating and heat dissipation. In hyperhidrosis, however, sweating and facial flushing are completely out of control. Hyperhidrosis and facial flushing leave the patient in a daily state of helplessness, agitation or panic. What are the tests for stress and postural hyperhidrosis? 1. Laboratory tests Routine blood, urine, stool and cerebrospinal fluid tests and blood biochemical tests are mostly non-specific. Secondary hyperhidrosis laboratory tests are related to the primary disease. 2, imaging examination The majority of cranial and limb imaging examinations are normal, while secondary hyperhidrosis has manifestations related to the original disease. 3, autonomic function examination Autonomic function examination, for hyperhidrosis has auxiliary diagnostic and differential significance. Restricted hyperhidrosis often begins in childhood or adolescence, can occur in both sexes, some have a family history, can last for several years, and has a tendency to naturally decrease after the age of 25. The most common sites of restrictive hyperhidrosis are the palmar-plantar and friction surfaces, such as the axillae, groin, and perineum. This is followed by the forehead, tip of the nose, and chest. The palmoplantar hyperhidrosis can be persistent or transient, caused by mood swings, without seasonal differences, often with chills 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 hyperhidrosis is caused by excessive activity of the small sweat glands, unlike axillary odor which is mainly caused by the sweat glands. Generalized hyperhidrosis is mainly due to generalized sweating caused by other diseases, such as infectious hyperthermia, due to neurological regulation or oral antipyretics to dissipate heat by sweating. Other conditions such as damage to the central nervous system including the cortical and basal ganglia, spinal cord or peripheral nerves can cause generalized hyperhidrosis.