Body itch belongs to pruritus, there are many causes, common causes include systemic diseases, dry skin, neuropsychiatric factors and other factors. 1. Systemic diseases: such as uremia, obstructive hepatobiliary diseases, hyper- or hypothyroidism, diabetes mellitus, desiccation syndrome, dermatomyositis, lymphoma, leukemia, and other malignant tumors and other diseases, often itchy skin symptoms. 2. Dry skin: such as the elderly skin aging, skin barrier damage, sebum secretion can cause dry skin; frequent bathing, or bathing water temperature is too high, can lead to dry skin; air is too dry, can also cause dry skin, which causes itchy skin. 3. Neuropsychiatric factors: such as various neurological dysfunction or organic lesions, as well as emotional tension, anxiety, fear, excitement and depression, etc., can induce itchy skin. 4. Other factors: such as pregnancy, drugs, food, climate change, work and living environment, living habits (often use of alkaline soap, cleaning skin care cosmetics), close to the clothing worn, etc., can cause generalized itching. It is recommended that patients according to their own situation, if necessary, to the regular hospital, follow the doctor’s instructions to clarify the cause of the disease, reasonable treatment.