Hello

Looks like your frog could be holding water. Have you tried soaking in warm water to see if it just needs to urinate? It is normal for them to store water in their blatter and may look bloated sometimes when full. Edema on the other hand can be a sign of serious issues. If the frog feels like it is full of fluid try and see if the frog changes after urination. If the frog still appears to have fluid retention, but is baggy with noticeable fluid movement in the body cavity, it is most likely edema which can be a sign of kidney or liver disease.

You should probably provide some information about how you're caring for the animal such as climate levels and whether you treat your frog's water with a conditioner like ReptiSafe ect just to make sure everything is on track.

Get the frog to urinate and go from there.

Best Regards
Grif