The collateral ligament, also known as the supraspinous ligament and interspinous ligament of the neck, is a fibrocartilaginous tissue mainly located in the spinous process of the cervical vertebrae and filling in the interspinous process. It mainly plays the role of stabilizing the spine, especially in low head activities, the collateral ligament can well stabilize the vertebrae of the neck and prevent the vertebrae of the neck from moving forward. However, after a long period of head-down activities, it is easy to cause repeated strain on the collar ligament, causing spasm and contraction of the collar ligament, and even sclerosis of the collar ligament. This will lead to significant pain and swelling in the middle of the back of the neck, and after a serious situation, it is also easy to cause excessive strain on the collar ligaments, causing degeneration and osteophytes in the cone area.