Infants always shaking their heads is considered a normal reaction, but may also be related to calcium deficiency, epilepsy and various other factors. 1. Normal reaction, infants are not yet fully developed, the brain nerve function is incomplete, may appear shaking head and brain symptoms, this situation is generally more normal. 2. Calcium deficiency, if there is a lack of calcium in the body, it may lead to an increase in the excitability of the infant’s nervous system, so this symptom will occur, accompanied by crying, irritability, excessive sweating and other reactions. 3. Epilepsy, if the baby suffers from epilepsy, seizures may appear head shaking symptoms, but also may produce the body convulsions and spasms and other reactions. Babies always shaking their heads, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.