Five months baby sleep back and forth shaking head can be seen in physiological factors, pathological conditions (such as vitamin D deficiency, etc.), specific need to analyze and judge according to the baby’s condition. 1. Physiological phenomenon: If the ambient temperature around the sleeping area is high, or the baby is wearing more clothes, which makes the baby sweat and feel uncomfortable, it can be manifested as the above phenomenon; pay attention to adjusting the indoor temperature and reduce the clothes as appropriate, which can ease the above phenomenon. 2. Pathological conditions (1) Nutritional vitamin D deficiency rickets: in the early stage of the disease, there can be manifestations of increased neural excitability, such as sleep sweaty scalp stimulation and head shaking phenomenon, often accompanied by irritability, crying, etc., can be accompanied by bone changes such as cranial softening. (2) Eczema: It is a common skin disease in this age group, such as severe skin damage on the face and scalp, producing obvious itching and oozing, which may affect sleep and the above phenomena. (3) Others: for example, otitis media, with ear discomfort such as ear stuffiness and ear pain, can also appear the above phenomenon. Five-month-old baby sleep shaking his head back and forth, there may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.