The skin is always itchy for the following reasons: 1. It may be caused by dry skin, especially in the autumn and winter seasons, the overall dryness of the external environment, and at the same time, because of the colder autumn and winter seasons, commonly used hot water baths, long-term hot baths, will also lead to a large number of skin oils washed down, so it will lead to very dry skin, thus leading to itchy skin. 2. It may be in the skin allergy period, such as The itchy skin is caused by skin problems such as eczema, hives and psoriasis. 3. If you have diabetes, kidney disease and liver and gallbladder problems and other tumors, you may also suffer from abnormalities in the metabolism of various enzymes and bile in your own organism, leading to itchy body.