My green tree frog doesn't go to the bathroom anymore, even days after eating. I notice that she'll hang on the glass upside down and looks like she's in discomfort. When I see her doing that, I give her a 20 minute water bath in her mini carrying tank and she usually will do her business in there. can someone shed some light on this for me please?

heating/lighting/humidity are in the proper ranges and haven't changed. Her appetite has decreased significantly since the summertime.

thanks