Hey, sorry, I tried to answer this earlier but the forum was down.
Blotches usually aren't a good sign, but mine have had them before and they disappeared pretty quickly. I can't say what's happened with the Neosporin, whether that made the blotches stick around.

I'd monitor your frog's appetite and see whether they spend longer than usual in the water dish. I wouldn't put on more Neosporin for now, I'd wait and see if the skin seems to heal or if there are other symptoms.