Drainage of large scalp hematomas is possible, but not necessary, depending on whether the hematoma is able to self-absorb.
If the hematoma does not absorb on its own, or if it absorbs slowly, and the patient is at risk of severe pain and bleeding, drainage is usually recommended, as well as localized compression bandages or cold compresses to promote absorption, which can reduce the degree of trauma involved in draining the hematoma.
If a large hematoma in the scalp can disappear on its own, and the hematoma will gradually shrink and return to normal, drainage is generally not recommended, and cold compresses or compression bandages can be applied to the local area, after which the blood vessels will slowly contract, preventing local bleeding and reducing pain.
If there is a large hematoma on the scalp, the treatment needs to be carefully observed to understand the hematoma recovery, if it can not disappear on its own, it should be dealt with in a timely manner.