Most babies who always bump their heads at night are not normal. For example, rickets due to vitamin D deficiency, or sinusitis and cranio-cerebral system diseases may lead to frequent bumping of the baby’s head. Baby sleep at night always knocking head may be and vitamin D deficiency caused by rickets, vitamin D deficiency leads to calcium and phosphorus metabolism disorders, increased nerve excitability, resulting in baby sleep disturbance, irritability, etc., prone to kowtowing symptoms. If the baby has sinusitis night breathing is not smooth, easy to lead to head pain or itself has a craniocerebral system of disease, such as brain hemorrhage or cysts or seizures are possible, will cause head pain and lead to kowtowing symptoms. There may be other reasons why babies always bump their heads at night, so it is recommended to go to the hospital in time for a complete examination to clarify the cause of the disease and then give targeted treatment or therapy.