Patchy baldness in children may be caused by heredity, mental factors, endocrine disorders or infections. 1. Family heredity: If there is a family history of baldness and one or both parents suffer from baldness, children may have baldness due to genetic factors. 2. Mental factors: Excessive study pressure may cause mental anxiety, depression and sleep disorders, in which case the symptoms of baldness and hair loss will appear. 3. Endocrine disorders: it may be due to abnormal hormone secretion levels in the body, especially androgen secretion abnormalities leading to localized baldness. 4. Infection: it is common to be infected with pathogens such as herpes virus. As the pathogens destroy the immunity of the body, some patients suffer from decreased immunity and impaired hair follicle growth, which leads to the appearance of patchy baldness. If a child develops baldness, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease and to carry out targeted treatment or therapy with the help of a doctor.