Dermatologists may inject a corticosteroid solution directly into a hypertrophic scar or keloid, which may help reduce its size. Steroids break the bonds between collagen fibers, which reduces the amount of scar tissue beneath the skin. Steroids also have powerful anti-inflammatory properties, which can help reduce swelling, redness, itching, or tenderness.
After a scar has healed, steroid injections are typically given in a dermatologist’s office. A doctor may administer steroids prior to surgery if you have a history of keloids or hypertrophic scars and need to have surgery. Preoperative steroid injections may stop the development of a hypertrophic scar or keloid, or they may lessen the size of the scar. During surgery, a further steroid injection may be given by the surgeon.