This is Dr. Christian. Welcome to JustAnswer. A few questions will help me get a clearer picture of the situation:
She is about 7 years old
Not aware of any medical conditions at this time
Yesterday, her lips were rock hard. She does not want us to touch her mouth and definely open it up for us to see. We brought her to our vet. She suggest maybe a bee sting? Benadryl 50mg 3Xday. Didn't make a difference. When not sleeping she is wincing in pain and crying. She does not want any hard food. She kept us up all niight crying and wincing in pain.