It is effective in about 70 per cent of cases but there is a risk of long-term side effects. UV-A1 phototherapy has been shown to cause flattening and softening of keloid scars. The mechanism of action is thought to be related to a dose-dependent induction of collagenase enzyme. There are several other techniques used in scar treatment, all with a limited role. Cryotherapy using liquid nitrogen is only effective on about 30 per cent of cases and is mainly used to treat scars on the shoulder and back.
Liposuction can level the contours around a sunken scar.
Although vitamin E cream has been recommended for scar treatment, there is no medical evidence to prove that it has any effect. Cosmetic camouflage Cosmetic camouflage is not a treatment, but can effectively disguise a scar. The formulation of camouflage creams, some of which are prescribable, gives the necessary covering power with only a thin application. Some camouflage creams are waterproof, and they often protect sensitive areas from the effects of the sun. Effective camouflage technique depends on the use of a number of opaque covering creams, which are non-irritant and have better finish and durability than standard cosmetics.