A keloid is a growth of fibrous tissue at the site of a healing scar caused by overproduction of collagen. Keloids are most common on the breastbone, upper back, and shoulder but can occur anywhere on the body.

Some people, especially those with dark skin, are more prone to developing keloids.

Signs and symptoms include:

• Firm, raised, hard scars.
• Color that varies from slightly pink to very dark.
• Tenderness or itching.
• Continued growth and clawlike projections.

Keloids do not require treatment. But for cosmetic reasons or to relieve keloid pain or itch, they can be surgically removed, frozen with liquid nitrogen, or treated with medicine. If removed surgically, a keloid may recur in the surgical scar.