There is a pit in the back of the head, and there are several common causes: first, due to congenital development, normal development, does not cause symptoms in the head, and there are no other parts of the symptoms. In this case, it is not recommended to deal with it, and there is no need to deal with it. Second, there is a history of trauma, trauma and caused by the back of the head area of the skull fracture, but did not buckle reset, often this growth continues, can cause the back of the head area of the pit, feel softer. In this case, if there is no obvious pressure on the surrounding old tissues, also do not recommend related treatment. The above questions are for reference only, the specific medication and treatment please refer to the doctor’s interview guidance.