Itchy body is always considered to be caused by not paying attention to personal hygiene, pruritus, itchy rash and so on. 1. Don’t pay attention to personal hygiene: If you don’t pay attention to personal hygiene and don’t take a bath for a long time, the surface of your body will be colonized with bacteria, which will cause itching after the chemical reaction with the secretions of the skin. 2. Pruritus: Pruritus and dry skin and mental stress and other factors have a relationship, the main symptom is itchy skin, and the performance of the whole body itching, but in the itchy place there is no original lesions, the degree of itching varies from person to person, some just a burning sensation or ant line sensation, and some will be a severe itching. 3. Itchy rash: the cause of itchy rash is more complex, and a variety of factors, such as emotional stress, fatigue, mosquito bites, etc., mainly will appear in the red wind ball-like pimples, accompanied by intense itching. Always itchy, there may be other reasons, it is recommended to go to the hospital in a timely manner, to clarify the cause of standardized treatment.