The main cause of thigh swelling may be due to local trauma. In this case, if you want to quickly reduce the swelling, it is recommended that the patient must apply ice to the area within 48 hours after the injury, which can effectively improve the local bleeding situation, so as to effectively achieve the purpose of rapid reduction of swelling. Because the ice can make the subcutaneous bleeding capillaries to contract, can effectively play the purpose of stopping bleeding. If 48 hours after the injury, it is recommended that the patient apply hot compresses to the area, because hot compresses can make the local capillaries dilate, thus effectively improving local blood circulation, which can accelerate the absorption of the hematoma and play the purpose of rapid swelling reduction. Gentle massage in the local area can also effectively relieve the swelling. It is recommended that if the swelling is obvious, patients should go to the hospital for timely examination and symptomatic treatment after clear diagnosis, such as intravenous infusion of mannitol or sodium hesperidin to promote the swelling to subside.