Itchy scalp after sweating can be considered to be caused by physiological reasons or pathological reasons (such as contact dermatitis, seborrheic dermatitis and other diseases). 1. Physiological reasons: after the scalp sweating, there are more components within the sweat, such as water, urea, sebum, amino acids, cholesterol, etc. These components can stimulate the scalp, which in turn produces an itchy feeling. It is recommended that patients pay attention to personal hygiene, wash their hair diligently, usually after the hair is clean, the discomfort symptoms can disappear naturally. 2. Pathologic causes: (1) contact dermatitis: if the patient’s body is more sensitive, after contact with shampoo, conditioner and other allergens, there can be a sweaty scalp is particularly itchy symptoms, at the same time, the scalp will also appear erythema, blisters, dandruff and so on. (2) seborrheic dermatitis: the cause of the disease is not known, may be related to genetics, Malassezia infection, diet, etc., can appear a sweaty scalp especially itchy symptoms, but also at the same time the scalp can also appear erythema, pimples, greasy flaking. In addition, after sweating scalp itching serious may also be angioneurotic edema, cholinergic urticaria and other diseases. It is recommended that patients consult a doctor in a timely manner, under the guidance of a professional doctor, to conduct relevant examinations, to clarify the cause of the disease, and then follow the doctor’s instructions to receive treatment. At the same time, patients need to pay attention to diet and avoid scratching their scalp to avoid aggravating the discomfort.