Head hit a bag is usually a manifestation of scalp hematoma, scalp hematoma in the acute phase of 24-48 hours can take measures of local cold compresses, with ice water or ice local cold compresses, each time 20-30 minutes, 2-3 times a day, do not massage the hematoma squeeze hematoma, so as not to hematoma further increase. After 48 hours in the acute stage, hot compresses can be used to promote the absorption of hematoma. If the hematoma is huge, local puncture can be taken to aspirate the liquid hematoma, and then put pressure bandage to facilitate the absorption of hematoma. Scalp hematoma may also be combined with intracranial injury, we must closely observe the patient’s mental, pupil and blood pressure changes, if there is any abnormality promptly consult the doctor, the possible craniocerebral injury for targeted treatment.