Your scar is visible proof of your body's self-healing process. What a wonderful process especially when you think about the number of times that you bump into things or injure yourself.
The body reacts to "injury" by first quickly stopping any bleeding through the formation of blood clots. It then tries to close any cuts and repair damaged tissue. This is done by quickly laying down collagen tissue in a haphazard manner. Basically the body is trying to quickly repair damaged tissue. The repaired tissue is different from the original tissue. The differences include: 1) the replacement tissue and associated collagen fibers may be sticking to other structures (ie there may be adhesions), 2) movements may be restricted due to these adhesions, 3) the "new" repaired tissue lacks the flexibility/pliability of the original tissue.
It is possible to re-mould scar tissue as the body reacts to the stresses applied to it. By engaging scar tissue with appropriate techniques underlying adhesions can be broken down. This helps to restore tissue pliability as well as improving movement. Tissues can now slide over each other whether it is fascia, muscles, or internal organs. These same techniques can help to restore flexibility/pliability and to improve tissue strength.
Do you have problems with scar tissue or do you feel less mobile following an injury? You might benefit from approaches that address scar tissue effects such as myofascial release.