Traumatic mass may be the local hematoma caused by trauma, after more than ten years still exists may be the occurrence of mechanization or even ossification, in the case of not affecting the appearance of the function of the case can be regardless, if necessary, surgical resection. The localized mass caused by trauma is a common phenomenon, and most local hematomas with a small volume range can be absorbed and subside in a short period of time; In severe cases, the hematoma may still exist for more than ten years, and there are many cases, such as mechanization or even ossification, which can be ignored when it does not have a great impact on the appearance and function, while the lumps occurring in the face or joints and other important parts of the body can be surgically removed when necessary because they affect the activities or aesthetics. In the early stage of traumatic swelling, cold compresses can be applied within 24 hours to reduce local inflammation and exudate, while hot compresses and massage can be applied after 24 hours to accelerate the absorption of hematoma and exudate. It is recommended that trauma resulting in severe localized swelling, a longer period of time does not subside to produce a certain impact of the case to consult a doctor in a timely manner, to clarify the nature of the lump to take targeted treatment.