When the skin is injured, it sends collagen-making cells to heal the wound. Ideally, the cells do their job and close the injury, leaving a small scar. With keloids, the skin's cells continue to multiply even after the wound has healed. The scar tissue continues to grow, forming a large, raised scar.

Does scar tissue get bigger over time?

Scars can take up to 1 year to mature fully and go through four stages of healing. This slow process may explain why some people do not experience scar tissue pain immediately. Initially, the scarring may look minimal, but over 4–6 weeks, the scar may get bigger or become raised, firm, and thick.

Does internal scar tissue grow?

As we get fatter or older, they get worse." Most fibrotic disease likely begins as normal repair of an injury, scientists said. "But if the immune system produces too much of an initial scar, it can't go back to normal," Varga said. "You have an unhealed scar that keeps growing and can wipe out the entire organ."