The head is smashed and swollen, mostly considered to be caused by scalp hematoma. In order to promote faster absorption of scalp hematoma, it is currently recommended that ice be applied within 24 hours after the injury, which can promote vasoconstriction and prevent further expansion of the hematoma. 24 hours later, hot compresses can be applied, which can help to promote the absorption of local hematoma. However, head injury also needs to be paid attention to, because after the head injury, simple scalp hematoma will not cause a more dangerous situation, but the head injury needs to be alert to the occurrence of intracranial lesions, such as intracranial hemorrhage, which may lead to headache, vomiting, impaired consciousness and other manifestations. Therefore, the head injury needs to be closely observed within 72 hours after the head injury, and the head condition can be stabilized after 72 hours.