Yo Dragons …
This one is pretty easy for you. A “dental block,” exactly where you are describing, easily numbs the upper lip. In this case your own dentist can (and should) do this for you. This is not “infiltrated” but the nerve(s) itself is targeted. (With a good dentist, that uses a topical anesthetic first, you will not feel the injection at all … I mean nothing. Zero!)
The block will numb the upper lip … in the middle … but not the outside corners (the corners are usually not painful). The dentist should NOT use a super long-lasting anesthetic; just his/her normal lidocaine with “epi.” (2% is fine, but 1% is fine too.) You will have ±2-hours of anesthesia.
After the dentist zaps you, just relax and do not rush over to the electrologist … you should have ample time and “then some.” You might get a little “rush” from the epinephrine … but this reaction is absolutely safe and only lasts 10-minutes (your own body produces norepinephrine to counteract the additional epinephrine. Takes about 10-minutes. And NO you are not “having a heart attack” from the “rush.” Think too much coffee.)
Now the BIG warning! Do not allow the electrologist to get aggressive or to “take advantage of the numbing.” This is a (common) tragic mistake, because all signs of overtreatment will not be seen because of the anesthetic. This is like flying an aircraft in dense fog … on instruments only.
Oh yes, it’s such a temptation to really go overboard on the lip. Please do NOT do this. If you do, we will be hearing your “disaster story” here on Hairtell. Please heed my warning!
Virtually every story about the “horrors of anesthetic” have little to do with the anesthetic itself and EVERYTHING to do with inexperienced electrologists who go “balls to the wind” and clear-off too much. If you come out of the treatment with no hair on the lip … that’s TOO MUCH! Thin, thin, thin!
Okay?