Infant’s head shaking in sleep may be caused by immature nerve development, vitamin D deficiency and eczema. 1. Immature neurodevelopment: As the central nervous system and vestibular nervous system of infants are not fully developed, it may cause infants to sleep with their heads shaking, which is a normal phenomenon of the growth and development of the nervous system. 2. Lack of vitamin D: infants lacking vitamin D or calcium will lead to increased nerve excitability, which in turn will cause excessive sweating, and sweat stimulation of the scalp will bring discomfort to infants, which will often lead to head shaking during sleep. 3. Eczema: If the baby face, scalp or body with eczema, scalp eczema will appear itchy discomfort, the baby sleep by shaking his head to relieve the way. When the infant sleep head shaking around, and accompanied by physical discomfort, it is recommended that patients go to the hospital in a timely manner to avoid delays in the condition.