chin bumps

So any advice would be appreciated! Here’s what I HAVE done; Heinrich has been to the vet, $300 dollars later vet still had no clue. We did the fecal, Physical, Parasite check. He came back negative for anything they could check for. So they gave him some pills to help with his diarrhea...

So we were giving Hades a shower and dried him off and I noticed all these spots on his chin? There are lodes of them! I have no idea what has done it so we have tried to pop and clean them to stop them spreading but It's a bit uneasy with how many there are... I'm not sure if this is an...