Hypertrophic and keloid scars are a known complication of surgery on:

Thorax. Face, upper limb

Coloured races

younger patients

They are characterised by the growth of the healing tissue beyond the border of the wound. They can grow to large unsightly deformitiies, and patients have to be told of this complication prior to embarking on elective surgery, expecially in the predisposed individuals

Management:

They should NOT be excised, but treated if large, itchy and uncomfortable with intra-keloid injections of steroids.

They eventually settle but may take months or years to do so.