Discuss the causes and treatment methods of subcutaneous hematoma, particularly the subcutaneous swelling that occurs after facial injury.

Discuss the causes and appropriate treatment methods for subcutaneous hematoma, including the importance of incision drainage and compression bandaging.

Hematoma is often caused by external force that breaks the subcutaneous capillaries, leading to bleeding. The blood then leaks out from the broken capillaries into the subcutaneous tissue, causing the visible bruise on the intact skin. It is best to make a small incision for drainage, allowing all blood clots to come out and apply pressure bandaging. Early treatment is better; delaying it may lead to the formation of something similar to a bursa, which would be trouble (troublesome). It is recommended to decide on treatment based on the severity of the swelling.