The cause of itchy body can be contact dermatitis, pruritus, diabetes, viral hepatitis and so on. Contact dermatitis can take loratadine, itchy skin can be used externally, such as glycerin lotion, diabetes need to use metformin and other glucose, viral hepatitis can be antiviral, ursodeoxycholic acid and other bilirubin reduction. 1. Contact dermatitis: when contact with pollen, seafood can occur after eating an allergic reaction, causing generalized itching, need to terminate the allergens in a timely manner, serious cases can be under the guidance of a professional physician to take loratadine tablets, cetirizine tablets and other drugs to fight allergies; 2. Pruritus: complex etiology, common cause of dry skin, can be used externally and orally to reduce the symptoms of drugs, such as glycerine lotion, tacrolimus, etc., orally such as ipratropium, sertraline, etc.. 3. Diabetes: elevated blood sugar can also cause generalized itching, the need for active diabetic diet, taking metformin, acarbose and other blood sugar control, but also available to stop itching drugs such as itchy granules. 4. Viral hepatitis: viral hepatitis can cause hepatic insufficiency, which will lead to elevated bilirubin to produce jaundice, generalized itching symptoms, can be antiviral, alcohol cessation to remove the primary disease, combined with bisabolol to protect the liver, ursodeoxycholic acid to reduce bilirubin and other therapies can alleviate itching. When itching occurs, it is necessary to consult a doctor in time to identify the cause of the disease and then targeted treatment.