Is There Any Way to ''Sand Down'' the Scar Tissue So It Regenerates with a Soft Skin? (photo)

Hello, I have a surgical scar on my right cheek since 3 years old due to a birthmark removal by surgery. At the sides of the scar, the tissue is a thick mass and it's firm at touch; I think it's scar tissue. The problem is that it's noticeable at light, the scar tissues form a small bump. Is there some cream or acid product that can penetrate the skin and ''melt down'' the tissue so it regenerate softer ?