An ice shelf in my mouth

Woke up today with a most-annoying sensation: the cold has returned. It feels like frost has embedded the lower right corner of my mouth. For the second time during this malady, the numbness takes a back seat to the cold sensation. Oddly, what seems to abate the sensation, if only for a few seconds, is my warm container of coffee. I've taken another dose of ibuprofen hoping it will drop the "temperature" but no good, so far.