According to this article, The Pain of Being a Redhead , there may now be scientific evidence to prove it is so.
Nobody likes going to the dentist, but redheads may have good reason.A growing body of research shows that people with red hair need larger doses of anesthesia and often are resistant to local pain blockers like Novocaine. As a result, redheads tend to be particularly nervous about dental procedures and are twice as likely to avoid going to the dentist as people with other hair colors, according to new research published in The Journal of the American Dental Association.
I am a redhead and avoid trips to the dentist. Dental work is torture. Really, I would rather be water boarded! Just sit me in a dentist chair, turn on the drill and I will give away any secret! Where are the weapons of mass destruction? I don't know, but I could make up a very convincing story if it would avoid having my teeth touched! Where is Osama hiding? I will personally go out and look through every cave until he is found if you just don't come near me with the drill!
What a relief to finally hear from someone that my pain and dread is founded on truth. Whew! I mean, I have given birth without pain medications, its not that I can't handle pain, its just that
it is very hard to be told by a dentist, or doctor, that you are imagining the pain. After 6 Novocaine shots it is impossible for anyone to still feel the pain, or so they say!
Dr. Daniel I. Sessler, an anesthesiologist and chairman of the department of outcomes research at the Cleveland Clinic, said he began studying hair color after hearing so many colleagues speculate about redheads requiring more anesthesia.
“The reason we studied redheads in the beginning, it was essentially an urban legend in the anesthesia community saying redheads were difficult to anesthetize,” Dr. Sessler said. “This was so intriguing we went ahead and studied it. Redheads really do require more anesthesia, and by a clinically important amount.”
I once had to have a toe nail removed and was given a nerve block...whatever! I felt it all and next time I'll forgo the shots as they hurt as much as having the nail ripped off and the stitches put in. I also awoke during a surgery once. It seems I scared the doctors to death. I did not enjoy it either!
“Because they’re resistant, many redheads have had bad experiences,” Dr. Sessler said. “If they go to the dentist or have a cut sutured, they’ll need more local anesthetic than other people.”