Keloid and hypertrophic scars are the two types of excessive scarring, which are usually thick, unattractive masses of collagen at a site of the skin that has been injured. Scars mainly occur on the skin when there is a cut on the skin or breakage of muscles.
Keloid scars can be defined as the scars that grow beyond the original site of skin injuries. When a wound is healing, the skin cells and connective tissue cells begin to multiply to repair the damage, which can result in a scar. Keloid scar can form on any part of the body; it is estimated that 10%of people have keloid scars on their body.
Hypertrophic scars look similar to the keloid scars because of the thick cluster of scar tissue. Hypertrophic scars are results of imbalance collagen at the site of a wound. Hypertrophic scars are also red and raised to begin, and after some time, they become flat and pale.