What causes itchy hands?

The causes of itchy hands are varied and usually closely related to external environmental factors and individual physical conditions. On one hand, the hands frequently come into contact with various substances, such as chemical detergents, laundry powder, and disinfectants. These substances may irritate the skin, leading to allergic dermatitis or contact dermatitis, which can cause hand itching. On the other hand, fungal infections are also common causes of itchy hands—for example, hand癣 (tinea manuum), which is often accompanied by symptoms such as thickened skin and peeling. Additionally, climatic factors, such as dry skin during autumn and winter seasons, or specific occupations, such as housewives frequently handling hot water and soap for prolonged periods, may also damage the skin barrier of the hands, resulting in itching. To relieve hand itching, it is recommended to keep the hands clean and dry, avoid prolonged contact with irritating substances, and use appropriate medications under a doctor's guidance.