Collagen — a protein found throughout the body — is useful to wound healing, but when the body produces too much, keloids can form. Keloid growth might be triggered by any sort of skin injury — an insect bite, acne, an injection, body piercing, burns, hair removal, and even minor scratches and bumps.

Why does my keloid keep getting bigger?

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.

How do you stop a keloid from getting bigger?

As soon as the wound heals, begin using silicone sheets or gel. Applying silicone sheets or gel can help prevent keloids from forming and reduce the size of existing scars. You can buy these products without a prescription.