Acute soft tissue injury disorders that are not properly treated become chronic. However, most chronic soft tissue injuries are chronic in origin. Such as accountants, turners, typists and other long-term in a certain position, muscle contraction, even if you stop working, the muscle still can not restore the diastolic state, some hours, some even adult months. Medically known as “static residual tension”. Chronic soft tissue injuries are formed gradually over a long period of time and are not easily observed in the short term, but when symptoms become apparent, organic changes have already occurred. Chronic soft tissue injuries start slowly, in modern civilized society, chronic soft tissue injuries more and more, many people feel strange, they are not injured, neck, shoulder, waist, leg but very painful, in fact, cumulative injury will also make muscle fibers, microscopic blood vessels, ligaments light tears and bleeding, the body in the repair process will occur scarring and adhesions. Resulting in local pain and functional impairment. Common symptoms: 1, the affected part of the soreness or swelling, part of the tingling or burning pain. 2. Aggravated by exertion and relieved by rest; relieved by proper activity and frequent changes in position, and aggravated by excessive activity. 3.The movement of the affected part is limited. 4.There are pressure points in the affected area. 5.No abnormalities in the appearance of the affected part. The pain can be relieved immediately by small needle knife.