Welcome to JustAnswer! I am a licensed veterinarian and would be glad to help!
Is this something that is new or has been a problem for some time?
Regarding causes for these signs, possible causes may include:1) Abscess (unknown cause)2) Tooth disease or fracture leading to inflammation or infection3) Eating / Licking something that caused irritation to the mouth4) Systemic disease leading to nausea
In case there is a bad taste in the mouth you can offer a small amount of milk.
You can also offer 2.5mg of over the counter Pepcid A/C in case there is stomach upset.
If the signs do not resolve, I would recommend you bring her to your veterinarian for evaluation. Although a complete physical examination (heart, lungs, ears, belly) is important - a thorough examination of the oral cavity is very important as your signs are related to the oral caivity.I hope this information helps._____________________________________________________________________Please click "ACCEPT" if the information I have provided has been of help so I receive credit for my work. Bonuses are always welcome and appreciated. Thank you.The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would highly advise contacting your regular veterinarian.