You said it for years, but the scar is still red. Considering that you were injured because the wound was not stitched up in time, or the wound was inflamed and infected at that time, the scar widened, especially at the joints. In the early stage of wound healing, frequent finger flexion will lead to scar widening and scar hypertrophy when stimulated. There is no good way except to cut off the scar. Anyway, the skin tension here is not very great, and it is in the wrinkled part. After cutting, move back to prevent the scar from expanding again. But there are risks, and once the wound is infected, it will be very troublesome. Personally, if your scar is not deep and the surface can slide, it is best not to deal with it. If the part is hard and can't be pushed, cut it off, otherwise it will affect the finger movement.