Wound contraction, the next stage, pulls the sides of the wound together. Although the scars are innervated with blood vessels, they lack the oil glands and elastic tissue that normally protect the skin against irritation and can be painful or itchy. When these types of scars cover wide areas of skin, especially from massive wounds or burns, they can make movement difficult as well. Sometimes abnormally thick scar tissue results from a skin injury and is called hypertrophic scarring. Keloids are scars that are excessively thick and fibrous, tumour-like growths that extend beyond the wound's original limits.
Keloids seem to have genetic causes and are found primarily in people from African and Asian races.
All Rights Reserved . No images, graphics, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders.