Can Dogs Licking Cause A Blistering Rash On The Shin?

I have a raised blistering rash on my right shin which is now appearing on my left shin. Some eruptions are perfectly round like a pimple while others are spread out and amoeba shaped. It is biright pale ping and ver noticeable, covering an area over 6 or 7 inches on my right leg. It does not hurt and does not itch. I allow my dogs to lick me freely as they are deeply affectionate and I love them beyond belief. I wonder are they licking me for affection or are they licking what they perceive to be a sore. Did I get it from them licking me? I have tried topical ointments, both antibacterial, antibiotic and fungal. Nothing touched it. I cannot afford a doctor visit just any old time. I will await your recommendation before proceeding. Thanks so much.