Itchy body in winter, may be caused by dry skin, or pruritus and other diseases. 1. Dry skin: In winter the air is cold and dry, which usually causes dry skin and reduced sebum secretion, resulting in itchy skin. 2. Pruritus: it is a kind of skin disease with only itching symptoms and no primary skin damage. The causes are complex, such as external environmental changes, mental stress, and chronic diseases in the body, such as diabetes, hyperthyroidism, leukemia, and malignant tumors, etc., which can cause itchy skin. Winter pruritus is usually seen in the elderly population, due to the elderly skin aging, sebum secretion is reduced, and often use hot water to wash the skin, more prone to itchy skin in winter. 3. Others: If skin damage such as rashes and bumps occur, you should consider whether there are causes such as urticaria. Itchy body in winter, there may be other reasons, it is recommended to go to the hospital in time for further examination and standardized treatment.