The swollen arm can be reduced by alternating hot and cold compresses, and if necessary, medication can also be used to achieve the purpose of reducing swelling. 1. Hot and cold compresses alternately: the arm is swollen early, the patient can use cold compresses to reduce tissue exudation, but also can blunt the pain. 72 hours later and then replaced by hot compresses, can improve blood circulation, promote metabolism, so as to achieve the effect of swelling. It should be noted that the temperature of hot compresses should not be too high to avoid burns. It is recommended to use plaster or support for external immobilization as soon as possible, which can help reduce swelling. 2. Drug treatment: patients can use safflower oil and other drugs under the guidance of the doctor to reduce swelling, if accompanied by pain, you can also take oral ibuprofen, celecoxib and other non-steroidal anti-inflammatory drugs to achieve anti-inflammatory and pain relieving effect. If the patient’s symptoms are more serious and cannot be relieved by the above methods, it is recommended to go to the hospital in time to avoid fractures and other serious situations.