Babies sleeping with their heads shaking all the time is normal if it is caused by physiological and external factors, but abnormal if it is caused by pathological factors such as eczema and calcium deficiency. 1. Physiological, external factors: sleeping environment temperature is too high, too low, indoor light is too bright, the baby is too full, too hungry, head sweating too much and other factors, will affect the baby’s quality of sleep, appearing to sleep when the head is always shaking around the situation. 2. Pathological factors are usually of the following kinds: (1) Eczema: infants are exposed to poor stimuli, resulting in eczema on the head, causing scalp itching and discomfort, infants can shake their heads from side to side to relieve the itching sensation. (2) Calcium deficiency: Calcium deficiency will increase the excitability of nerves, and infants may show that their head shakes around when they sleep, love to cry, and are prone to sweating. If the symptoms of infants sleeping with their heads shaking around are serious, or if the symptoms persist without improvement, they should go to the hospital in time, and the cause should be clarified to give targeted treatment or therapy.