Infants shaking their heads all the time may be due to eczema in the occipital area, external auditory canal diseases, vitamin D deficiency, etc. 1. Occipital eczema: Because of eczema or prickly heat in the occipital area or the back of the neck of infants, which can lead to pimples with itchy symptoms, infants may shake their heads frequently to relieve the local itchiness. 2. Diseases of the external auditory canal: due to eczema in the external auditory canal of infants, cerumen impaction in the ear or otitis media in infants, which may cause ear discomfort, infants may shake their heads frequently to relieve the symptoms of ear discomfort. 3. Vitamin D deficiency: some babies are vitamin D deficiency or calcium deficiency when the excitability of the central nervous system and cerebral cortex increases. In this case, infants will also have the symptom of frequent head shaking. In addition to the above, infants shaking their heads all the time can also be seen in epilepsy and other causes, parents are advised to bring their infants to the hospital in time, with the help of doctors to clarify the causes, and actively cooperate with doctors to deal with or treat.