The back of the foot was hit by a heavy object swollen, first of all, should immediately go to the hospital for imaging to determine whether there is a fracture, the need for timely immobilization, through the cold compress, hot compresses, medication and other interactions to reduce swelling and pain. 1. Cold compresses: in the acute stage of foot trauma, the first should be the affected limb braking, at this time the local damaged blood vessels rupture bleeding, it is recommended to apply cold compresses and the use of elastic bandages with pressure bandage, help to reduce the sense of pain and local edema, congestion, injuries are prohibited within 72 hours of the hot compresses. 2. Hot compresses: after 72 hours of injury, patients need to change the cold compresses to hot compresses, usually and at night try to elevate the affected limbs, promote blood circulation, so that the local swelling dissipate as soon as possible. Do not massage at this time, otherwise it may aggravate the local damage. 3. Drugs: If the patient in the acute phase of the injury pain is heavy, you can take some pain medication such as ibuprofen, diclofenac and so on as prescribed by the doctor. After the acute period, you can use some blood circulation drugs such as Yunnan Baiyao to promote swelling and pain. If the patient has an open local injury, the wound should be sterilized with iodophor and other drugs, and once infection occurs, medical attention should be sought immediately. 4. The back of the foot was hit by a heavy object, but also need to be braked and immobilized in time to prevent pain from occurring. If the patient is examined and determined to be a fracture, it should be treated with splinting or surgery according to the doctor’s recommendation.