Ultra Violet rays or UV's cause the skin to burn in the sun.
D - to fully restore motor activity
Chondrodermatitis nodularis helicis is an inflammatory skin condition that affects the ear. It causes a painful bump to develop on the top rim or helix of the ear or the curved piece of cartilage just inside, known as the antihelix. The condition, abbreviated to CNH, is also known as Winkler disease.
Needs to be checked by a doctor.