I noticed yesterday my basset (Hannah) has a strange sore on her paw. She is not limping or acting like it bothers her. Tonight I noticed it looked a bit worse. I don't think she was stung or bit by anything. I thought maybe a blood blister?
The exact source is hard to know, could have caught the nail on somehting, hurt it and the dog could have been licking it, who knows, the main thing is clean it well and don't let the dog lick it (use a cone) You could also use polysporin.If it doesn't heal up the Vet needs to give like a Dex injection for itching and reduce swelling.