She turned blue. Literally.
They attributed her blueness to an anesthetic used by the woman, which killed the nerve endings in
"She reported having used large amounts of topical benzocaine the night before for a toothache," the two co-authors wrote.
CNN has reached out to Otis Warren, emergency physician at Miriam Hospital in Providence, Rhode Island, waiting to hear back.
It is caused by low oxygen levels
Blackwood wrote that the patient was "cyanotic", a clinical term for the blue appearance.
Acid-rich blood is usually associated with a light red color, but when blood has a lower oxygen content it may appear blue," the website states.