My son was in a go-cart accident 8 months ago, He ran through a chainlink fence and got bruised really bad under his chin. After 8 months (a few days ago) we noticed he has a small bruise and a knot/lump has came up in the same spot . Is it something I should be worried about?
Hello, This can be a hypertrophic scar or a keloid in the area of the injury. This is possibly a form of abnormal scarring in an area exposed to trauma. Get this evaluated by a doctor.