Hypertrophic scars are similar to keloid scars; however, their growth is confined within the boundaries of the original skin defect. These scars may also appear red, and are usually thick and elevated. Hypertrophic scars usually start to develop within weeks after the injury to the skin and may improve naturally, although this process may take up to a year or more.
In treating hypertrophic scars, steroids (which may be given as an injection or by direct application) may be the first line of therapy, although there is not one simple cure. Hypertrophic scars may also be removed surgically, and often steroid injections are used alongside surgery and may continue up to two years post-op to help maximize healing and decrease the chance of scar recurrence.