Body itching may be caused by simple pruritus, skin diseases such as urticaria, or systemic diseases such as diabetes mellitus, liver dysfunction and uremia. 1. Simple pruritus: usually no primary skin damage, itching as a characteristic manifestation, there may be burning, anthrax sensation and so on. 2. Skin diseases such as urticaria. Acute urticaria can cause generalized itching of the skin, accompanied by pimples; should go to the dermatology department for treatment in time, so as not to scratch the skin and leave scars. 3. Systemic diseases, such as diabetes. Diabetes in the late stages of patients will have many complications, including peripheral neuropathy will cause the body itchy, may also be accompanied by pins and needles, ants. Jaundice can also be itchy when liver function is abnormal, and patients with uremia have many complications, such as inadequate dialysis or hyperphosphatemia, which can cause itchy skin. If there is any discomfort, it is recommended to consult a doctor in time and standardize the treatment.