Large bag after traumatic injury to the back of the brain, usually hematoma, is the performance of the patient after the craniocerebral injury, suggesting that the occipital part of the back of the brain and the posterior cranial fossa fall injury is more serious. This situation requires different treatments according to different conditions of the patient, as follows: 1, if the patient complains of no dizziness, headache, nausea, vomiting and other symptoms, observation and treatment can be carried out; 2, if the patient’s hematoma is accompanied by a scalp laceration, head CT should be reviewed; 3, if the patient has a serious nausea, vomiting and other conditions, the patient needs to urgently go to the emergency room of the hospital for consultation, review of the CT of the head, and observation of the skull for skull Fracture, intracranial hematoma, epidural hematoma; 4, if the patient has hematoma, nausea, vomiting symptoms continue to worsen, and even consciousness disorder, need to carry out emergency surgical treatment, craniotomy hematoma removal or fracture repair or decompression of the posterior cranial fossa, to ensure that the intracranial pressure is lowered, to ensure that the patient’s life safety. Therefore, hematoma in the hindbrain should be treated differently according to different situations.