[spotted nikes]

You can call your vet and ask him/her what you can clean it with, put on it, and what you can give to stop the licking/itching. Dogs can develop fungal infections if spots like that are left untreated. If money is an issue, maybe apply for Carecredit - www.carecredit.com

If the vet can't fit you in before then, try a different vet.