What’s this crater in the back of an adult’s head?

A pit at the back of the head in adults may be related to congenital developmental abnormality, or it may be caused by skull fracture, cranial bone or intracranial tumor.
1. Congenital developmental abnormality: some people suffer from malnutrition due to insufficient nutrient supply when they are small, which may affect the development of the bones at the back of the head, and thus may show a pit at the back of the head.
2. Skull fracture: for example, falling from a high place or having a serious car accident may lead to a depressed fracture in the back of the head, which may cause a pit in the back of the head of adults.
3. Skull or intracranial tumors: if. Adults have skull tumors or intracranial tumors, due to the invasion of the tumor on the skull, resulting in the destruction of the skull, which may cause a pit in the back of the head.
Adults with a pit in the back of the head, if combined with other symptoms, should promptly seek medical attention, by the doctor to guide the treatment and adjustment.