Itching on the body once winter comes, it may be winter pruritus, dry eczema, and ichthyosis, all three of which may occur. Because after entering winter, the change of temperature leads to the contraction of the capillaries of the surrounding skin, which will aggravate the stimulation of the sensitive nerves and peripheral nerves on the surface of the skin, the symptoms of itching will appear, which is a physical factor, that is, an external factor. There is another factor is the body’s own factors, such as diabetes will also appear itchy symptoms, and renal insufficiency, will also appear once the winter itchy situation.