Scars can be caused by injuries or operations. These can constitute a cosmetic impairment as well as a functional restriction. In many cases, scar treatment can improve the extent and appearance of the scar and restore mobility. Scars are perceived to spoil the appearance of or even disfigure exposed areas of the body. Some scars may also cause considerable pain or restrict movement.
If healing is given sufficient time and is free of complications, scar care can begin as soon as the sutures have been removed, the scab has fallen off and the skin is free from irritation.  To moisturise the skin, a perfume-free, fat-rich ointment such as panthenol is recommended.
Tight, reddened skin over the scar is treated with anti-inflammatory substances. 

Scars develop when a wound which extends into the deeper layers of the skin heals. Depending on the injury mechanism and the care of the wound, the healing process proceeds with more or less obvious scarring. The formation of scars is a natural process in wound healing and therefore cannot be avoided. Following an injury, every type of tissue fundamentally forms a scar, including fatty tissues, tendons, muscles and bones.
A scar is a coarse, usually whitish, fibre-rich replacement tissue. In the most favourable cases, this replacement tissue is level with the surrounding skin, is soft and has only slightly differing pigmentation. However, depending on the type of skin, the position on the body and propensity to form scar tissue, excess scar tissue frequently forms, known as hypertrophic scars, or scars which are indented below the level of the skin, known as atrophic scars.
The formation of excessive scar tissue beyond the scar itself, a disturbed form of wound healing affecting the surrounding area of skin, is referred to as a keloid. These coarse, protruding, reddened scar extrusions often cause itching, pain and impaired function. The surface of the scar is very thin and easily injured. This massive disorder in healing and scar formation is the most difficult of the scar disorders to treat.  
So the appearance of a scar can vary widely, from hardly visible or tangible to massively obvious and restricting.
Once wound healing is complete, after 14-20 days, the formation of a scar begins; the wound transforms into a scar.
Older, unattractive scars which are already fully formed can also be successfully treated and improved.