What does the method that forehead hits a big bag rapid detumescence have

Forehead after the impact of a large package, may be caused by scalp hematoma phenomenon. Suggestions: first of all, should be timely cold compress with ice or cold towel, can shrink local capillaries, reduce the severity of the disease. In 24 hours, the cold compress replacement, can promote local ooze ooze absorption, conducive to swelling.