On the other end of the spectrum, keloid scars are when too much collagen is produced during the healing process and tissue starts to grow outwards, causing a raised benign growth to appear. Keloid scars can limit movement if they form near a joint! Another type of scar that can be seen following a burn injury is a scar contracture- this occurs when the skin tightens during the wound healing process. These types of scars can be incredibly painful and limit movement because they tend to sit deep beneath the skin.