skin scab

This started out as a small black lump, kind of like a pimple, and eventually fell off. It turned into a scab then hair grew over it. The scab came off and now it’s like this. The dog doesn’t seem to be in any pain or discomfort. Anyone see something like this before?

Hello! :wave: I have a 6 months old Papillon boy who developed some sort of skin problem 2 - 3 days ago. It looks like a large scab which seems to be tender and itchy. Currently, I am using Sulfodene 3-Way Ointment for Dogs, but I am not sure if that is working. Does anybody have idea what kind...