Swimming arm soreness is mostly caused by soft tissue injuries or lactic acid production in the muscles, which can be relieved by massage, hot compresses and oral medication. Swimming arm muscles for a long time large load exercise, may lead to muscle fiber strain and lactic acid accumulation, the occurrence of aseptic inflammation, causing pain. You can use a hot towel to apply warm compresses to the affected area to promote blood circulation and relieve muscle soreness. Or local massage to accelerate the metabolism of lactic acid, is conducive to relieving the discomfort of soreness. If the pain is more obvious and affects normal rest, you can use appropriate pain medication under the guidance of the doctor, such as ibuprofen, celecoxib and so on, to relieve the symptoms of pain. Usually pay attention to the local warmth, at the same time to rest more. If the localized swelling of the arm after swimming even affects the movement, it is recommended to go to the hospital in time for examination and treatment according to the examination results.