July 4, 2015
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Keloid

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What is a keloid?

Keloids can be considered to be "scars that don't know when to stop." A keloid, sometimes referred to as a keloid scar, is a tough heaped-up scar that rises quite abruptly above the rest of the skin. It usually has a smooth top and a pink or purple color. Keloids are irregularly shaped and tend to enlarge progressively. Unlike scars, keloids do not subside over time.

What is the difference between a keloid and a hypertrophic scar?

After the skin is injured, the healing process usually leaves a flat scar. Sometimes the scar is hypertrophic, or thickened, but confined to the margin of the wound. Hypertrophic scars tend to be redder and may subside by themselves (a process which can take one year or more). Treatment, such as injections of cortisone (steroids), can speed this process.

Keloids, by contrast, may start sometime after the injury and extend beyond the wound site. This tendency to migrate into surrounding areas that weren't injured originally distinguishes keloids from hypertrophic scars. Keloids typically appear following surgery or injury, but they can also appear spontaneously or as a result of some slight inflammation, such as an acne pimple on the chest (even one that wasn't scratched or otherwise irritated). Other minor injuries that can trigger keloids are burns and body or ear piercings.

What are keloid symptoms and signs?

Keloids are raised and look shiny and dome-shaped, ranging in color from pink to red. Some keloids become quite large and unsightly. Aside from causing potential cosmetic problems, these exuberant scars tend to be itchy, tender, or even painful to the touch.

Medically Reviewed by a Doctor on 6/27/2014

Source: MedicineNet.com
http://www.medicinenet.com/keloid/article.htm

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