The itchy tops of the feet may be related to physiological factors, or it may be caused by contact dermatitis, eczema, tinea pedis and other causes. 1. Physiological factors: for example, in the hot summer, wearing open-footed slippers to go out, resulting in the skin on the tops of the feet for a long time by the strong ultraviolet radiation, it may cause the tops of the feet itchy. 2. Contact dermatitis: It is common for a person to have itchy feet when the skin on the top of the feet comes into contact with dust mites, pollen, soap and other substances, which is likely to cause an allergic or irritant reaction, leading to an inflammatory reaction. 3. Eczema: usually caused by poor foot skin hygiene, long time wearing non-breathable socks, shoes, resulting in foot skin for a long time in a hot and humid environment. When eczema appears on the skin of the feet, it will cause itchy feet, and may be accompanied by localized pimples, papules and other manifestations. 4. Tinea pedis: usually caused by fungal infection of the foot skin, in the fungal stimulation, it may cause itchy feet, severe cases may also be accompanied by localized skin erosion on the surface of the foot, peeling and other manifestations. Itchy feet, exclude physiological factors, it is recommended to consult a doctor as soon as possible, after a clear diagnosis of the cause, to give targeted treatment and conditioning.