Infants often shake their heads may be physiological factors, but also may be the manifestation of certain diseases, such as eczema, lack of vitamin D, etc., should consult a doctor in time to find out the cause of the disease. 1. Physiological factors: the cerebral cortex and the development of the nervous system of infants is not yet perfect, for their own movement control is not good, easy to shake their heads phenomenon, and sometimes it is a kind of self-comfort of infants, which will produce a sense of pleasure. 2. Pathological factors: (1) Eczema: when eczema occurs in the scalp area of infants, the onset of eczema can cause itching and other symptoms, and infants are unable to scratch with their own hands, and will be relieved by shaking their heads. (2) Lack of vitamin D: When infants lack vitamin D or calcium, it is easy to lead to an increase in the excitability of the cerebral cortex, and infants are prone to night terrors, poor sleep, crying, sweating and other phenomena at night, which will cause infants to shake their heads to relieve the discomfort. Excluding the influence of physiological factors, it is recommended to take the child to the hospital to check the cause of the disease, according to the condition to take targeted treatment to treat.