Dry and itchy body is related to skin dehydration, skin oil deficiency and skin diseases, which can be treated with hydration, improved bathing habits and medication. 1. Skin dehydration: dry climate in the fall and winter seasons, long time in the air-conditioned room, daily water intake is relatively small, are prone to cause skin dehydration, resulting in dry and itchy body. At this time you need to hydrate, you can drink more water, put a humidifier indoors and other ways to hydrate the skin. 2. Skin oil shortage: repeated bathing leads to excessive skin cleaning, or the use of alkaline shower gel leads to the loss of skin oil, local epidermal tissue damage, the skin barrier function decreases, it is easy to cause dry and itchy body and other symptoms. At this time you can reduce the number of baths, change to neutral shower gel, more in the skin surface wipe moisturizer. 3. Skin diseases: (1) eczema: especially chronic eczema, can also cause dry and itchy body, at this time you can use moisturizing cream, mometasone furoate, hydrocortisone butyrate, etc., oral antihistamine drugs such as loratadine, cetirizine and other drugs. (2) Psoriasis: it also causes dry and itchy skin, at this time give external coal tar, halometasone, fluticasone propionate, etc., oral avitamin A, methotrexate and other drugs. (3) Ichthyosis: also cause dry skin, fish scale-like scales, itching, at this time can be given topical moisturizing cream, retinoic acid ointment and other drugs, if necessary, oral medication such as Avitamin A. Patients feel dry and itchy on the body, suspected disease factors, you can immediately go to the regular hospital. Drugs need to be used in accordance with medical advice.