PCF mouth problem

[Shiro]

So, when I was cleaning the frog's tank today I noticed my oldest/biggest frog was sitting with her mouth open, and it looked really unusual, so I picked her up and checked her mouth out. She has a small red-orange bump on the side of her mouth and it's causing one side of her mouth to be stuck open. I cant get a good picture of it right now, but I did get two pictures... It's really hard to tell in the pictures and they're a bit blurry, but my camera can't take macro pictures very well.

[Shiro]

I'm sorry for the double post, but I really need help. Any information or advice would help me. Even if its just "put her down, she's suffering". Anything that might help me prevent it from happening to my others would be greatly appreciated, too.

[Frog Mom]

I didn't post before because I've never dealt with sick frogs, so I didn't really feel qualified to give advice, but based on other posts I've read, I'd isolate her from the other frogs for now and see if she gets better.

[Shiro]

Yeah, I have her away from the others. It's not a tank I'd like her to be in, because it's so small... But it's better than the possibility of harming my two other females and only male.

I'm used to mouth infections in snakes, and I have medicine I can put on their mouths when they get mouth infections... But, I don't want to risk using it on Big Legs and having it harm her.

[Frog Mom]

Well, good luck. I hope she gets better.

[Shiro]

The redness on her mouth has gone away, and it's no longer stuck open. Now I just need to get her to eat, so she's back to a healthy weight.