Swelling caused by a broken leg can be alleviated by cold compresses, hot compresses, or local treatment, physiotherapy, etc. In the first 24 hours after the injury, you can apply ice to the affected area to reduce bruising and blood seepage. 1. Alternate hot and cold compresses: the first 24 hours after the injury, you can apply ice to the affected area, which can reduce bruising, blood seepage and reduce the damage; 24 hours after the injury, you can switch to hot compresses, which can effectively accelerate blood circulation and promote swelling. 2. Local treatment: If the skin of the leg is broken without timely disinfection, it is easy to be infected with inflammation and cause inflammatory edema. You can use iodophor to disinfect and then use erythromycin ointment, mupirocin ointment to prevent infection, bandage the wound if necessary, and change the medication regularly. 3. Physical therapy: If the swelling is more serious, you can use local infrared physiotherapy, microwave physiotherapy and other physical therapy to promote swelling and pain, and promote healing. After the leg skin broken can first according to the above way to deal with, to the specific medication should be carried out under the guidance of a professional physician, to avoid unauthorized use.