Redheads have genes to thank for their tresses. Research shows red hair usually results from a mutation in a gene called MC1R, which codes for the melanocortin-1 receptor. The pigment found in red hair that makes it red is called pheomelanin.
Redheads appear to be more sensitive to pain, and less sensitive to the kinds of local anesthesia used as the dentists, research recent suggests.
A 2004 study found that redheads required significantly more anesthetic in order to block pain from an unpleasant electric stimulation.
Another study found that redheads are more sensitive to sensations of cold and hot, and that the dental anesthetic lidocaine is less effective for redheads.
The MC1R gene that can cause red hair codes for a receptor that is related to a family of receptors involved in perceiving pain, which may explain why mutations in MC1R would increase pain perception.
Because of their increased pain sensitivity and reduced tolerance to anesthesia, redheads may avoid the dentist. A 2009 study found that redheads were more anxious about dental visits, had more fear that they would experience pain during a visit, and were more than twice as likely to avoid dental care than those without the MC1R gene.
The above is copy and paste from a couple different sources - very accurate info.
My dentist gives me extra lidocaine every visit. That's a lot of shots ...
Here's a money saving tip for souvenirs: Don't buy them at over-priced souvenir shops. Instead, save yourself some $ by going to drug stores, like CVS & Rite Aid.
RedHeadedTaurus Blog Comments (20)
So romantic ...
How many have you had ... ? 
RE: Cat Watching Horror Movie !!!
Loved it ... the cat is almost as cute as you are