The picture is tough to see. Can you take a lighter one and I'll see if I can tell what's wrong. How big is the frog in length? His belly is bloated. Is he pooping for you?

How 'bout take a picture of his home and of him. Give us an idea of the temp and humidity.

There is an article here on care for red eyed tree frogs. It's a good article and helped me quite a bit when I hot mine. Start there. Then send us some pictures and information and we'll try and help.

I'll be waiting to hear back.