Patchy baldness in children belongs to non-scarring hair loss disease, which can be related to genetic, mental, emotional stress and autoimmune diseases and other factors. Patchy baldness can occur at any age, congenital quality is one of the factors, can be due to genetic inheritance, internal and external environmental factors induced by the onset of the disease. Mental stress response can also lead to the occurrence of the disease, such as mental tension, anxiety or sudden panic can occur rapidly baldness. In addition, autoimmune and metabolic diseases can also induce the formation of baldness, such as thyroid disease, diabetes, vitiligo and other diseases complicating baldness can be higher than the normal population. At the onset of the disease, there may be a sudden oval or round area of hair loss of varying numbers and diameters with clear borders on the head, where the skin is smooth and free of scales, inflammation and scarring. Children with bald spots on the head, it is recommended to go to a regular hospital specialist in time, and follow the doctor’s instructions to standardize the treatment.