Itchy body location is not fixed, but most of the asymptomatic due to pruritus, the causes are mainly dry skin, mental illness or other diseases. 1. Dry skin: this is the main cause of itchy body, dry skin will be accompanied by itching and pain and other symptoms. 2. Mental illness: mental factors often lead to itchy skin and other phenomena, such as mental tension, anxiety, etc. In addition to emotional factors, some mental illnesses can also cause itching, such as depression, paranoia, etc., the patient will feel that there are bugs crawling on the skin, and constantly scratching. 3. Other diseases: some visceral diseases can also cause itchy skin, such as tumor patients will have itchy skin, but there is no primary rash. Diabetes, hepatitis, nephritis patients who do not control the disease in time will also cause skin itching. Appear on the body itch location is not fixed but no symptoms of this phenomenon, it is recommended to strengthen the skin care work, can go to the hospital in time to do the appropriate examination.