Pillow baldness in infants may be caused by physiological factors, lack of vitamin D and so on. 1. Physiological factors: due to the baby’s age, lying in bed for a long time, the weather is hot and sweaty, resulting in sweating scalp area, the baby will frequently use the head to rub the pillow, will lead to localized occipital baldness, generally no other abnormalities, parents should be adjusted to the indoor temperature. 2. Lack of vitamin D: infants and young children with insufficient vitamin D content, may affect the calcium absorption, resulting in a lack of calcium in the body, will make the body of calcium ion metabolism is abnormal, pillow baldness, may also be accompanied by more than crying at night, when the seriousness of the infant’s physical development will have a negative impact. If an infant has occipital baldness and other abnormalities, parents are advised to take the infant to the doctor for examination and treatment to avoid affecting the physical development.