Keloid scars. These are scars that grow bigger than the original wound. Instead of stopping when the skin is healed, the body keeps making collagen for months — or even years — after the injury, creating a raised scar. These types of scars can form anywhere but are most common on the abdomen, back, chest, ear, jaw, or shoulders. People with dark skin or red hair are more likely to get a keloid scar. Contracture scars. If your skin has been burned, you may have a contracture scar. These scars tighten the skin, which might make it harder to move the affected part of your body. If the scar is deep, it may also affect the muscles and nerves underneath. Hypertrophic scars. Also called raised scars, these scars may shrink over time but never completely flatten out. They're similar to keloids but don't grow beyond the boundary of the injury.