I recently got this hatchling ball from a local petco during their sale. They told us he had mites, and was in the back for about a month until he was better. The day we got him home I had noticed he has a lump on the side of his ribs. It's small, but noticeable. My original thought was a hernia, but with my understanding of hernias they can appear and disappear, usually when touched. His lump is rather firm and fixed to it's location. Would this be anything he would need to go to the vet for? I would hate to find out he's sick after we did just get him, any advise would be helpful!