The causes of very itchy body are as follows, suffering from allergic or allergic skin diseases such as eczema, contact dermatitis, hives, etc., internal diseases, physiological factors and other diseases. 1. Suffering from allergic or allergic skin diseases: allergic or allergic skin diseases are relatively common, such as eczema, contact dermatitis, hives and so on. Most of them are due to food factors, drug factors caused by skin allergic reaction will cause itching and other symptoms. 2. Internal medicine diseases: common liver and kidney diseases, such as cholestasis, renal insufficiency, endocrine diseases such as diabetes caused by sensory neuropathy, etc., will cause patients to itch and other phenomena, it is recommended to go to the hospital in time to do the relevant examination, for the cause of treatment. 3. Physiological factors: such as not paying attention to personal hygiene or clothing moisture, can also lead to itching. It is recommended to pay attention to personal hygiene and cleanliness, and keep the room clean and tidy. The body is very itchy, often affect the health of the body, it is recommended to pay attention to, timely to the hospital to do the relevant examination, according to the cause of the conditioning and treatment.