Hello My Dear Friend! Well, I have to say that I don’t usually see a problem on the underside of the mid tail region. Typically tail issues occur at the base where fleas like to hang out. In these cases I ask clients to use a flea comb to look for evidence of fleas. The little black specks that resemble pepper, or a live flea in the comb is proof that fleas are present. Which is an easy fix these days with all of the safe efficacious products available. But, this is not your case. I would question a few… Read more »