Keloids can appear anywhere on the skin, but most commonly appear on the breastbone, upper back and shoulder.
Keloids are more frequent in black people than in white people.
Causes Keloids occur due to a defective or overactive healing process in which an excess of collagen forms at the site of a healing scar. Underlying cause is unknown. Signs and Symptoms Firm, raised, hard scars that are slightly pink. Scars may itch, cause pain, or are tender to the touch. Scars may continue to grow and develop claw-like projections over a period of time.