There are many causes of muscle soreness, such as over-exercise, trauma and fasciitis. 1. Excessive exercise: patients with a large number of strenuous exercise or excessive exercise, due to part of the muscle to produce a large amount of lactic acid, lactic acid accumulation in the muscle localization, then there will be muscle soreness, especially in the workout parts of the muscle, there will be obvious soreness. 2. Traumatic injury: muscle recently suffered from external blows, stick injuries, impact injuries, etc., may induce muscle aseptic inflammation, due to inflammatory exudate, therefore, will lead to muscle soreness. 3. Fasciitis: long-term chronic muscle strain, localized cold and other factors, will also seep out a large number of inflammatory factors, so it will cause muscle soreness phenomenon. There are many reasons for muscle pain, if the phenomenon occurs for a long time and can not be relieved, it is recommended that patients go to the hospital in time to improve the examination, clear diagnosis and then give standardized treatment.