8-month-old baby shaking head may be related to the baby’s imitation and other physiological factors, but also other factors such as calcium deficiency, eczema, etc., need to go to the hospital in time to find out the cause of the disease. 8-month-old baby at this time is in an important period of physical growth and development, the nervous system is not yet fully developed, there will be shaking head, body trembling and other symptoms. Secondly, babies have a great curiosity about the external environment, and when they see adults shaking their heads, they will keep repeating the imitation. Other reasons, such as hearing rhythmic music, happy mood will also appear similar phenomenon. Calcium and vitamin D deficiency in babies can cause the nervous system to increase in excitement, thus showing the symptoms of head shaking, which can also be accompanied by developmental delays. Eczema is a common skin disease in infants and young children, when blisters and rashes appear on the head, babies will shake their heads when they feel uncomfortable. When your baby is not feeling well, you should go to the hospital immediately.