Red-Eyed Tree Frog swollen chin?

[DonLisk]

Hello all I'm new here and looking for a bit of advice about 2 weeks ago I bought two Red Eyed Tree Frogs, I have them housed in a 20 gallon high tank with coconut substrate and some fake plants. Today when I went to mist the habitat I noticed both of their chins looked swollen like a frog would look when calling but they weren't making noise. I picked one up to see if being moved would make it go away, it didn't. They seem to be healthy otherwise. They were definitely stressed at first but over the past couple of weeks they seem to have settled into their new environment. They are moving regularly at night and seem OK the swollen chin has me a bit worried though. Attached is a picture of what they're looking like right now.

HI Ryan,
What are you feeding them?
Are you finding any poop in the viv?
Pics of the viv might help someone ID a potential issue too.