a keyloid is a scar that has gone wild... it is usually caused by a bad wound on your body... I had one on my ear from a piercing and I have known other people to get them after they have had an surgery. mine looks like a peanut hanging off my ear but the ones on the skin look like raise skin. NO it is not cancerous and can be treated if you see a doctor with injections or removal all together
what is a keyloid and is it cancerous?