Hair loss in infants can be related to malnutrition as well as congenital alopecia. Malnutrition or unbalanced nutrition is a common cause of pediatric hair loss. Occipital baldness is characterized by thinning of hair on the back of the head and upper neck. It is mainly caused by repeated friction and sweating between the occipital part of the baby’s head and the surface of the pillow, due to nutritional deficiencies such as calcium and vitamin D. It occurs mainly after 2 months of age. It mainly occurs in infants and young children after 2 months of age. Congenital alopecia can usually be divided into generalized and localized. Children are born with no hair on the whole body or locally, but there are children with normal hair at birth who begin to show symptoms of hypoplastic and sparse hair on the whole body after 6 months and do not have all the length and color of normal hair. Its probably an autosomal dominant disorder. Babies will lose hair, there may be other reasons, such as physiological factors, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.