If the lower extremity becomes red and painful, the following treatment methods can be taken: 1. Pay attention to the protection of the lower extremity, do not continue to use the injured side of the lower extremity weight-bearing activities, and wear loose clothing to reduce the pressure and stimulation around the redness and swelling. In addition, patients must control their hands, not to squeeze, rub or scratch these red and swollen parts. 2, the early use of cold compresses, the red and swollen parts of the heat can use ice for cold compresses, but the cold compresses should be careful, the ice is wrapped in a towel inside, the painful parts of the cold compresses for 10-20 minutes can. 3, after the above treatment, patients should go to secondary After the above treatment, the patient should go to the orthopedic department of a hospital above the second level as soon as possible, to clarify the cause of this symptom, and then the targeted treatment. In this case, there may be local infection foci or skin lesions or local joint inflammation, which may require the use of anti-infective and anti-inflammatory drugs for treatment, and some even require debridement and drainage surgery.