Mechanical tension on a wound has been identified as a leading cause for<unk>  formation. When a normal wound heals, the body produces new collagen fibers at a rate which balances the breakdown of old collagen.<unk> s are red and thick and may be itchy or painful. They do not extend beyond the boundary of the original wound, but may continue to thicken for up to six months.<unk> s usually improve over one or two years, but may cause distress due to their appearance or the intensity of the itching; they can also restrict movement if they are located close to a joint. Some people have an inherited tendency to<unk> ring, for example, those with Ehlers–Danlos syndrome.
Hypertrophic scar
Infibulation
Craterization
Couching 
Contraction band necrosis
Fatty streak
Moist desquamation
Desmoplasia