The causes of children’s hair baldness include seborrheic dermatitis and spot baldness. 1. Seborrheic dermatitis: it is related to folliculitis, bad living habits and dietary habits, and is categorized into inflammatory and non-inflammatory. Patients will experience thinning and thinning of hair, gradual loss, as well as increased oil secretion from the scalp, increased dandruff, itching and other symptoms, and in severe cases, brown or greasy yellow scabs will appear. 2. Patch baldness: Patch baldness is related to factors such as low immune function, endocrine disorders, lack of trace elements, mental stress and heredity, etc. Symptoms are patchy alopecia with clear boundaries, no inflammatory reaction, hair loss, loose hair at the edge of the hair loss area, easy to pull out and other phenomena. Children’s hair baldness piece by piece, if the symptoms can not be relieved or aggravated, should promptly consult a doctor, under the guidance of a professional physician reasonable standardized treatment.