The leg is still swollen even after half a month, which may be caused by factors such as unrecovered trauma and infection, and can be treated through general treatment and medication (such as penicillin) in a timely manner. 1. Trauma is not recovered: leg trauma is more serious, treatment is not timely or treatment measures are not appropriate, may affect the recovery of the affected area, tissue fluid long-term oozing accumulation, the body can not be effectively absorbed, resulting in swelling of the leg, you can promptly promote the absorption of the tissue fluid through hot compresses, you can also take to promote the operation of the blood, eliminating the body of the drug treatment, such as the Shu Jin and blood pills, and so on. 2. Infection: improper wound treatment and care may induce infection, resulting in swelling of the legs, to diligently disinfection, local anti-inflammatory, serious symptoms can also use penicillin, amoxicillin and other drugs to control infection. The leg is still swollen after half a month, you can promptly consult a doctor for treatment, strictly comply with the doctor’s prescription medication.