For the past year, Ive had this mark that looks like a hickey appear in the same spot on my neck three different times. Its right in the middle of my neck and doesnt itch, hurt, or feel irritated, but I know its definitely not a hickey. Im 39 and generally healthy, so Im nervous because I cant figure out whats causing it. Hydrocortisone cream hasnt helped, and by the time I manage to book a doctors appointment, its already gone. It just shows up randomly without warning. What could this be?

Dermat opinion