Redheads experience more pain and require more anesthesia during medical procedures according to a new study published in the Journal of American Dental Association.

The study found that redheaded patients were more than twice as likely to avoid seeking dental care than dark haired patients due to anxiety about pain.

The cause of their increased sensitivity to pain is related to a mutation of the gene that causes melanin. Some brunettes also have the mutation, but it is more rare.

The gene affects the body's perception of pain, increasing sensitivity. The conclusion is that if you are a redheaded woman, then you may want to ask for more pain relief during medical procedures, especially if you have felt excessive pain during prior procedures.