My red foot has a decent sore on his right front leg and another small one starting on his left. We think it's from rubbing on his shell. As a nurse I know what to do for people, but I'm lost on what to do for Sammy!
My apologies, but the pic. is not clear for me. Treat like you would a person, if scabbed over basically leave alone, if still open keep clean till it scabs over, and watch for infection.