Keloids are a form of scar tissue that occur due to acne, blisters, trauma, body piercing, razor bumps, vaccinations, or surgery. Often in rare cases, keloids can form where there has been no visible injury.

Keloids are different from normal scars. They are known to be like scars that do not stop growing. Typically keloids appear as round, smooth, shiny skin elevations that may be a pink, purple or brown in color. It has been observed that keloids are often described as uncomfortable and itchy and may appear unsightly. At times, keloids can be tender and painful to the touch.