Pruritus can be caused by a number of reasons, such as diabetes-induced pruritus, pregnancy pruritus, uremic pruritus, geriatric pruritus, etc. Patients can self-test for pruritus through symptoms. However, it is generally not recommended to self-test, it is recommended to consult a doctor in a timely manner. 1. Diabetic pruritus: most diabetic patients start from the vulva, and then the whole body itching, may cause dry skin after water loss. 2. Pruritus of pregnancy: patients occur in the third trimester after pregnancy, this itching may continue to worsen, the end of pregnancy itching will gradually improve. 3. Uremic pruritus: most patients begin to develop pruritus after chronic renal failure. 4. Geriatric pruritus: the older the skin is drier, the nerve endings are sensitive, there may be in the neck or limbs and other parts of the severe itching, scratching and there may be skin damage. It is recommended that patients with itchy skin problems, timely to the hospital, by a professional doctor to determine the cause of the disease, and symptomatic treatment. In addition, pay attention to the appropriate diet rich in vitamins, such as fresh vegetables and fruits, as little as possible or do not eat spicy, stimulating food, strengthen the skin moisturizing, to avoid the itching symptoms continue to worsen.