The time to absorb a hematoma is related to the type of hematoma and the size of the hematoma. Subcutaneous hematomas are usually absorbed in 2-3 weeks, while smaller intracranial hematomas take 4-6 weeks to absorb. There are various types of hematomas, including trauma-induced subcutaneous hematomas, retroperitoneal hematomas, and epidural hematomas that occur after head trauma. There are large individual differences in the rate of hematoma absorption, such as small subcutaneous hematomas formed after trauma can be completely absorbed in 2-3 weeks; larger subcutaneous hematomas are absorbed slowly, and the fluid can be aspirated after the hematoma liquefies; smaller intracranial hematomas can be gradually absorbed in 4-6 weeks; larger intracranial hematomas can compress brain tissue and may lead to brain herniation, endangering the patient’s life, and cannot be left to absorb on their own. It requires timely surgery. In addition, local hematoma can be treated with hot compresses and Chinese herbal medicines to activate blood circulation and resolve blood stasis to accelerate the absorption of hematoma.