They do look a little pink, don't they? Is there anything in the tank that he could be rubbing himself on accidently that would cause irritation? Is all his water treated? Is there any other fish/frogs in the tank with him that could be causing stress? We have a great Moderator on the Forum who has vast knowledge on these little guys, named Terry. I am sure that if he sees this thread he will be able to help you more. It's a good sign that your frog is still active and eating, though. Hopefully this is something common and minor and there will be nothing to worry about!![]()