Don't feed him for a few days. One of two things could be going on.

One he hasn't digested his food yet and is swelling up. Warm him up alittle and soak him a few times a day. This happens with snakes a lot.

Two- This sometimes happens.... kidneys shut down. They retain water and do not make it. There is no known way to fix this problem yet. I bought a group of 50 babies and the swelling occured in a few days and all the frogs were lost within a few days.


Just don't feed it anymore until the bloating goes away. Your case looks like the first option with over feeding and not digesting the food quick enough.
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