The hazards of the tendon bag are mainly as follows: 1, will cause the appearance of unattractive, after the emergence of this situation, the patient in the process of activity, the body surface will see an obvious protruding skin surface of the swelling, which will make the patient feel the appearance of unattractive. 2, causing serious pain, in the patient’s activities, this type of swelling will induce the surrounding muscles, tendons, and produce obvious pain. 3, leading to the surrounding When this condition occurs, the surrounding muscles and tendons will not dare to move because of the fear of pain, and in the long run, it will produce wasting atrophy, which will lead to the decline of muscle strength. 4, leading to severe limitation of activities, or decrease in the mobility of the joints. After the emergence of hamstring bag, the patient will often take some self-protective measures to reduce the activities, which will lead to a decline in the mobility of the surrounding joints. 5, it will lead to the surrounding joints to produce degenerative changes faster, such as osteoarthritis, cervical spondylosis, and other diseases.