Keloids are raised overgrowths of scar tissue that occur at the site of a skin injury (Fig 1). They occur where trauma, surgery, blisters, vaccinations, acne or body piercings have injured the skin. Less commonly, keloids may form in places where the skin has not had a visible injury. Keloids differ from normal mature scars in composition and size. They can itch and cause sharp, shooting pains when pressed.
No one knows why keloids form. Although most persons never form keloids, others develop them after minor injuries or even after insect bites or after acne bumps resolved.
Keloids may form on any part of the body, although the ears, jawline, neck, upper chest, upper back and shoulders are especially prone to keloid formation. Although anyone can form a keloid, persons with darker skin form them more easily than those with lighter skin, and may develop them in several places. Keloids never turn into skin cancer.
Keloids can be difficult to treat. Keloids are scar tissue, and it is important to realize that you can never change a scar back into normal skin.
The goal in treating keloids is to
Potential side effects of the common treatment for keloids