Depending on the injured part, the skin in this part will contract and relax due to the extension and flexion of the lower limbs. Because the scar granulation tissue is tough, the granulation tissue is hard and will not shrink, so it is normal to have a slight bulge in some areas.

Guiding opinions:

If it affects the appearance, you can consider minimally invasive surgery combined with local doctors. The operation is not big, and it will recover in 2 weeks after operation. But there will still be scar residue after operation, but now the scar wound may be smaller.