I'm hoping someone here can help. My cat had strange dry skin lumps up the back of his hind legs so the vet gave him anti biotics and an injection. It isn't a reaction to flea bites. (He does get de flead even though he's totally indoor). Vet didn't know what it was but seemed to go away but now it's back and even worse than before. I'm taking him to vets tonight. He won't let me have a good look, I'm guessing its sore. I'm just worried that it might be something really bad. Anyone got any idea what it could be. The rest of his skin is perfect. They're sort of lumpy, dry, scabby bits he gets. Maybe I'm just over worried but I'd hate it to be anything serious.