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About keloid scars
A keloid scar is a raised scar left on the skin after a wound has healed.
Keloid scar can result from any type of injury to the skin. These include:
- surgical incision (cuts)
- piercing
- vaccination sites
- acne.
Keloid scars are caused by an imbalance in the body’s production of collagen when wounds are healing. (Collagen is a protein produced by the body which plays an essential role in the structure and function of skin, cartilage, bones, and connective tissue).
Keloid scars can grow beyond the boundary of the original wound and may be painful and cause itching.
Young people and those with dark skin are more prone to developing keloid scars, particularly on the ears, chest, shoulders and back.
About hypertrophic scars
Hypertrophic scars are red and raised. They may be painful or itchy. They do not extend beyond the boundary of the original wound, but may continue to thicken for up to 6 months.
Hypertrophic scars usually improve within 12 to 24 months and generally fade and flatten over time. They may cause distress because of their appearance or itchiness, or because they restrict movement if located over a joint.
Treatment
Treatment for keloid and hypertrophic scars involves a course of steroid injections. These help to help soften and flatten the scars, and relieve any symptoms of pain or itching.
We sometimes apply silicone in sheet or gel form, to help reduce the size or restrict the growth of the keloid or hypertrophic scar. Sometimes we use cryotherapy and laser treatment.
We do not recommend surgery to remove a keloid or hypertrophic scar because they are likely to grow back in increased size.
You cannot get rid of keloid and hypertrophic scars, but these treatments can help improve how they look and reduce irritation. Early treatment can stop the keloid or hypertrophic scar growing.
More information
British Association of Dermatologists information on keloid scars
Contact information
See your GP if you think you have a keloid or hypertrophic scar.