The baby fell asleep after shaking his head from side to side, can be seen in physiological phenomena, pathological conditions (such as vitamin D deficiency, etc.), the specific need to analyze and judge according to the baby’s situation. 1. Physiological phenomenon: if the baby sleeps around the environment at a higher temperature, or wearing clothes and thicker blankets, there can be more sweating phenomenon, can stimulate the scalp to appear left and right head shaking phenomenon, belong to the normal physiological phenomenon, adjust the indoor temperature and reduce the blankets, etc. The above phenomenon can be relieved. 2.Pathology (1) Nutritional vitamin D deficiency rickets: especially for younger babies, in the early stage of the disease, there may be increased neural excitability, such as sweating, can stimulate the scalp to appear the above phenomenon, and some of them may be accompanied by bone changes. (2) eczema: such as facial and scalp more serious eczema, there can be obvious itchiness and other discomforts, affecting sleep, appear after falling asleep, shaking head from side to side phenomenon. There may be other reasons for babies shaking their heads from side to side after falling asleep, so it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.