My 2 1/2 year old pitbull appeared to have a dime sized soft pinkish lump. Over the period of 4 days, using triple antibiotic ointment and just general keeping it clean, it looked as if it was healing. I checked today and it seems a little larger and im just not sure what it could even be because of the way it looks , similar to maybe a blood blister? Please any advice. I will take him to the vet if this doesn't seem to get better but I live quite far from the nearest one.