After three years of surgical removal of a pigmented nevus on the top of the head, the appearance of a red patch at the original incision is mostly considered to be scar formation.
Generally speaking, after excision of nevus, the wound will gradually recover in about one week, and the scar that appears after surgery will gradually disappear and become lighter in about 6 months. Depending on the individual’s physique, it may take longer for the scar to fade away, or even some people may not get rid of the redness, or even develop localized raised keloid scars, which may be accompanied by itching and pain symptoms.
Keloid scars can be treated with local injections, lasers, compression therapy, radiation and other methods.
The formation of keloid at the incision after surgery is recommended to go to a specialized hospital and be treated under the guidance of a physician.