There are several common causes of fever in the right leg, namely soft tissue infection, blood overabundance or gout, as follows: 1, soft tissue infection: need to go to the hospital for examination in a timely manner, mainly laboratory tests, to make clear whether there is an infection occurs, and timely antibiotic anti-infective treatment. 2, blood overabundance: generally recommended to try to avoid strenuous exercise, to reduce the excessive flow of blood. 3, gout: It is recommended to pay attention to diet, fasting high purine food, at the same time to strengthen the drinking water, if necessary, you can take anti-inflammatory and analgesic drugs orally, you also need to take oral uric acid-lowering medication, and then regular re-examinations, through the amount of uric acid to determine the next step in the treatment program.