The hair on the back of the head is bald, may be due to baldness, rickets and other reasons.
1. Spotted baldness: the specific cause is still unclear, mostly related to mental state, endocrine disorders and immune inflammation and other factors. Patients often appear as a sudden oval or round hair loss area of varying number.
2. Rickets: mostly seen in infants and young children, due to abnormalities in sweat regulation in such patients, when infants and young children sweaty head, it will stimulate the head often rubbed with the pillow, thus leading to localized hair loss in the back of the head.
There may be other reasons why the hair on the back of the head is bald, so it is recommended that the patient go to the hospital in time for the relevant examination to clarify the cause of the disease, targeted treatment.