Arm muscle strains are mostly caused by sudden force or improper posture of the arm. According to the degree of muscle strains, they are divided into minor strains and severe strains, which can generally heal in about 3 weeks. Minor strains are characterized by slight localized swelling and pressure pain in the muscle, no bruising, usually painful when moving, and this can be slowly recovered by rest. If the strain is more serious, there will be obvious local swelling, bruising and pressure pain at the time of injury, and in serious cases the arm cannot move, you can first do ice packs to relieve local swelling, and elevate the affected limb above the level of the heart to help reduce swelling and pain, after 48 hours, you can change to hot packs, topical application of active oil to improve local blood circulation, reduce swelling and pain, and at the same time, you can take oral muscle relaxation and blood circulation tablets, through recuperation for 3 weeks, most patients can heal. Most patients are able to heal. After the arm strain must pay attention to rest, with the use of drugs, is conducive to rapid recovery.