Local masses on the lateral thigh often have the following causes: First, after the thigh is hit by external force, the local soft tissue injury appears hematoma, at this time, if the bleeding of the hematoma stops and there is no progressive aggravation, local ice can be given for 24 hours to reduce tissue exudation, and after 24 hours, local topical blood-stasis ointment, oral swelling and pain, bruising and injury pills and other drugs can promote local hematoma absorption faster; Second, lipoma, the lateral thigh The abnormal accumulation of adipose tissue can form a tumor-like mass, if it does not cause pain and swelling to the patient, it can be temporarily not specially treated; if the tumor of lipoma slowly increases with obvious pain, the patient is recommended to undergo surgical excision to avoid serious complications.