I think this was meant for the tree frogs part of the forum.

It sounds like stress. Is it too hot or cold in the tank? Is the area loud? Was the frog wild caught? What size is the tank?

You might want to try covering the tank for a while. Or if the frog doesn't seem to have any obvious stress factors in the tank maybe it's restless. You could even let it practice hunting in a clean bucket or something if the frog can't hunt feeder insects inside the tank.