In general, cranial hematoma can be eliminated in about 2-3 weeks, but it must be decided according to the actual situation, because there are large and small cranial hematomas, for some small cranial hematomas, some can be completely eliminated in 1 week, and do not need too special treatment measures, conservative or corresponding medical medication can be. If the cranial hematoma is relatively large, such as more than 30ml or even life-threatening, such a surgical procedure must be taken to completely remove it, and the subsequent application of internal medicine and other corresponding treatment means, so this may take a longer time, about 1 month. So the point is that it must depend on the size of the patient’s cranial hematoma, and whether it is accompanied by other symptoms, so that the most accurate answer.