The more you scratch the tops of your feet in the summer, the more itchy they get. This may be due to eczema, polymorphic sun rash, contact dermatitis, and other diseases such as urticaria. 1. Eczema: The cause of eczema is not clear, and is considered to be related to internal infection, heat, and contact with pollen or animal fur. Patients will have pimples, intense itching, papules, small blisters and other manifestations. Generally, the hot weather in summer is easy to induce eczema, if the patient has eczema on the surface of the feet, there will be more scratching on the surface of the feet, the more itchy performance. 2. Polymorphic sun rash: the cause of polymorphic sun rash is not clear, may be sun exposure, metabolic abnormalities, endocrine dysfunction and so on. Patients in the spring and summer will have itchy skin, papules, papules, erythema and other symptoms. Therefore, patients in the summer the top of the foot is exposed to the sun for a long time, it is easy to appear polymorphic sun rash, patients will have the symptom that the more you scratch the top of the foot, the more itchy it is. 3. Contact dermatitis: contact dermatitis is considered to be caused by skin contact with exogenous substances, and patients will manifest pimples, papules, blisters, edema, itching and so on. If the patient’s summer foot contact with poor quality shoes and socks, the patient will appear contact dermatitis, easy to have the more scratching the more itchy performance. It is recommended that patients with summer foot scratching more itchy manifestations, need to promptly consult a doctor, the doctor will be for the cause of the treatment.