The specific risks of tendon sheath cysts in the ankle depend on the size of the tendon sheath cyst. Small tendon sheath cysts do not produce specific clinical symptoms, are not painful, and do not affect the movement of the ankle joint, and are not particularly harmful. If the tendon sheath cyst is particularly large, it will cause some pain and affect the movement of the ankle joint after moving the ankle more, which is the danger of a large cyst. At this point, it is also suggested that this large cyst should be considered for surgery to remove it. The tendon sheath cyst itself is a benign lesion that does not metastasize or expand further. Therefore, even if there is harm, at most the change in size and the corresponding change in pain, after the surgery, the above-mentioned pain and other harm will basically disappear, there is no need to worry about this.