Leg soreness after running is mainly considered to be related to excessive accumulation of lactic acid or local inflammation, muscle soft tissue strains and so on. Specific relief methods need to be analyzed according to the causes, such as medication, physical factor therapy and exercise therapy. 1. Excessive accumulation of lactic acid: Running for too long, too fast, and sudden running by people with no exercise habit are likely to cause fatigue of the leg muscles, which will produce excessive accumulation of lactic acid, and so the symptom of leg soreness after running occurs. You can choose local hot compresses and massage to promote lactic acid metabolism, so as to relieve the pain. If the soreness is obvious and affects daily life, it can be relieved by magnetic heat therapy as well as infrared and other physical factor therapy. 2. Local inflammation: usually if you often run for exercise, it is possible to trigger leg fasciitis, the stimulation of inflammation is prone to produce the symptoms of leg soreness after running, you can take non-steroidal anti-inflammatory drug treatment, such as celecoxib and so on. 3. Muscle soft tissue strain: If you don’t do a good job of warming up before running, or if you exert yourself too much, it may lead to leg muscle soft tissue strain, and the symptoms of leg soreness will easily appear. In the acute period, pay attention to the brake rest, and in the later stage, you can promote the recovery through the method of exercise stretching and muscle strength training. Pay attention to warm-up activities before running and stretching activities after running. If the symptoms of leg soreness are more serious, it is necessary to be treated under the guidance of a professional physician to prevent motor dysfunction in the later stage.