The method of skin scratch test for vegetative nerve disorder is to scratch the skin with a hard and sharp object to stimulate the vegetative nerve, and by observing the skin condition, it can initially determine whether the patient has vegetative nerve disorder or allergic dermatitis. The specific method is as follows: take a cotton swab or a sterilized lancet and scrape the skin on the forearm and other thin keratin areas, avoiding the skin with wounds to prevent infection. At the same time, avoid repeatedly scraping the same skin, so as not to affect the effect. Observe the state of the skin after repeated scraping, if there are symptoms of sympathetic and parasympathetic excitation such as the skin continues to turn white or red, then the skin scratch test is positive. The diagnosis of phytoneurological disorders cannot be confirmed by the skin scratch test alone, and it is necessary to go to the hospital to undergo tests such as the Anxiety and Depression Inventory and the Prone Blood Pressure Test to further confirm the diagnosis.