I had novacaine at the dentist yesterday. When I woke up this morning, my face was swollen from my eye down to my mouth. Called my dentist and they said if there was no pain, not to worry about it. I've never had an issue with novacaine, but it seems strange that it would be something else since it is on the side of my face where the injections were. Even after benadryl and advil, it is still puffy, especially just below my eye.