The patient is advised to use ice packs for 24 hours, and pay close attention to the changes in the patient’s condition, whether there is severe dizziness, headache, nausea, vomiting, etc. If there is any of these phenomena, the head CT must be checked to exclude critical cases of intracranial hemorrhage. If the head knocked a large bag, 24 hours after the patient’s symptoms are not what serious, you can use hot compresses to promote local absorption. Close attention should also be paid to the patient’s symptomatic changes to rule out the possibility of delayed bleeding. For delayed hemorrhage, the patient’s head is traumatized for 24 hours after the trauma, there is severe headache, nausea, vomiting and other phenomena of increased intracranial pressure, which is considered to be delayed hemorrhage caused by trauma to the brain. The patient is advised to check the CT of the head, and if the bleeding is relatively large, surgery can be considered if necessary. For patients who have knocked a large bag on the head, it is recommended to pay attention to rest and avoid emotional excitement that causes increased blood pressure.