See you had a dog bite and have now developed certain skin lesions in the same area.
I would like to tell you that this is surely a cause of concern and needs further assessment since you are developing the skin lesions in a previous healed scar.
There are various granulomatous diseases which a dermatologist
will need to rule out and in some cases even a skin biopsy
So you should not ignore it. You should see a nearby dermatologist soon for the same.
Dr Geetika Paul