Itchy head is related to a variety of factors, common seborrheic dermatitis, tinea capitis, scalp psoriasis and so on. 1. Seborrheic dermatitis: has a greater relationship with the excessive secretion of oil in the scalp area, patients are prone to itchy head, hair loss and a series of symptoms. 2. Tinea capitis: a disease caused by fungal infection of the scalp, patients will have itchy head symptoms, often accompanied by dandruff, hair loss and other phenomena. 3. scalp psoriasis: the pathogenesis is not clear, belongs to the scalp part of an inflammatory disease, the patient will appear scalp itching, dandruff and other phenomena. In addition to the above factors, ringworm, folliculitis and contact dermatitis can also cause itchy head symptoms. It is recommended that the patient go to the hospital in time, complete the examination and make a clear diagnosis, and then carry out the relevant treatment under the guidance of the doctor.