Baby sleep always shaking head, may be physiological reasons, may also be due to disease, such as rickets, head, ear diseases. 1. Physiological head shaking: when the baby sleeps, if the quilt, wear clothes are thicker or the indoor temperature is higher, resulting in the baby’s head sweating phenomenon, it will make the baby sleep shaking head. In addition, during sleep, some babies will also appear occasional head shaking symptoms, which is a normal physical activity, no need to worry. 2. Rickets: If the baby sleeps always shaking head, need to pay attention to the state of certain diseases. May be seen in vitamin D deficiency caused by rickets, manifested by sleep disturbance, shaking head in sleep phenomenon. 3. Head and ear diseases: some babies have eczema in the head and pillow, external ear canal, or otitis externa, otitis media, etc., which can cause babies to shake their heads in sleep. If the baby sleep always shaking head, to go to the hospital for relevant examination, clear cause, targeted treatment.