I Am Experiencing Extreme Tenderness Of The Mouth And Younger.

I am experiencing extreme tenderness of the mouth and younger. Difficulty swallowing. Fever severe sweating about the head. I am being treaed for mersa on. Y back with Bactria. I have pain in my neck and left arm most likely the result of a pinched nerve identified in C7. Bad headache. What can cause this tenderness in my mouth. Feels dry