Keloids

Alternative Names: Hypertrophic scar; Keloid scar; Scar - hypertrophic

Keloids are the excess growth of scar tissue at the site of a healed skin injury.

Causes of Keloids

Keloids occur from such skin injuries as:

• Acne
• Burns
• Chickenpox
• Ear piercing
• Minor scratches
• Surgical cuts
• Traumatic wounds
• Vaccination sites

They are more common in people ages 10 to 20, and in African Americans, Asians, and Hispanics. Keloids often run in families. Keloidosis is a term used when many or repeated keloids occur.

Keloids Symptoms

A skin lesion that is:

• Flesh-colored, red, or pink
• Located over the site of a wound or injury
• Lumpy (nodular) or ridged

The lesion may itch while it is forming and growing.

Tests and Exams

Diagnosis is based on the appearance of the skin or scar. A skin biopsy may be needed to rule out other skin growths (tumors).

Treatment of Keloids

Keloids often do not need treatment. They may be reduced in size by:

• Corticosteroid injections
• Freezing (cryotherapy)
• Laser treatments
• Radiation
• Surgical removal

Prognosis (Outlook)

Keloids usually are not medically dangerous, but they may affect the appearance. In some cases, they may become smaller, flatter, and less noticeable over a period of several years.

Exposure to the sun during the first year after the keloid forms will cause the keloid to tan darker than the skin around it. This dark color may be permanent.

Removing the keloid may not be permanent. Surgical removal may cause a larger keloid scar.

Potential Complications

• Cosmetic changes that affect the appearance
• Discomfort, tenderness of the keloid
• Irritation from rubbing on clothing or other forms of friction
• Limited mobility (if the keloids are extensive)
• Psychological distress if the keloid is large or disfiguring
• Return of the keloid

When to Contact a Health Professional

Call your health care provider if:

• You develop keloids and want to have them removed or reduced
• You develop new symptoms

Prevention of Keloids

You can prevent discoloration from sun exposure by covering the forming keloid with a patch or Band-Aid, and by using sunblock when spending time in the sun. Continue these extra protection measures for at least 6 months after injury or surgery for an adult, or up to 18 months for a child.

Imiquimod cream has recently been used to prevent keloids from forming after surgery, or to prevent keloids from returning after surgery to remove them.

Juckett G, Hartman-Adams H. Management of keloids and hypertrophic scars. Am Fam Physician. 2009;80(3):253-260

Habif TP. Benign skin tumors. In: Habif TP, ed. Clinical Dermatology. 5th ed. St. Louis, Mo: Mosby Elsevier; 2009:chap 20.

Keloid above the ear	Keloid, pigmented	Keloid, on the foot

Review Date: 10/5/2010
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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