Pawing at the mouth?

[Nova]

Hello! So I have noticed Mabel paws at her mouth about everytime I go to say hi to her. At first she would only paw when she was eating, which I thought was normal as food might get caught or something. But while I was playing with her she started pawing again. I checked her teeth and they are trimmed down, not anything that would be bugging her. She doesn't drool, and she eats with no problem. What do you think could be causing her to paw at her mouth so much? (She has plenty of toys to keep her teeth in check, and she absolutely loves to chew.)
Her mouth is slightly open at times (In these pictures her mouth was open), but she closes it back up after a few minutes. Is this a sign of anything?
I have included pictures of her mouth, if that is any help (Quality is bad, and she wouldn't stop moving, so slightly blurry.)
Thanks! xoxo

 

[Dreamlite]

Pawing at the mouth is a sign of pain. I would take her to a vet and get an oral exam and xrays done. Her hind teeth may be over grown or have spurs which can be fixed with a quick dental while she is under. I would want to rule out root elongation. That does not have a treatment. Drooling doesn't start with teeth problems until they are severe in most cases.

 

[Nova]

Ah, that is what I was expecting. Luckily our vet is around the corner, so it should be no problem to get her in.
We will most likely take her in tomorrow, Wednesday, or Thursday. Whatever works for the vet (I am hoping for tomorrow, as the vet keeps the animals that have surgery or go under anesthesia stay over night, so I would be picking her up on the easiest day.)
Thank you so much

 

[Nova]

Update: So her appointment is at 10:30am on Thursday.