Blue lips may represent a type of cyanosis caused by a lower level of circulating oxygen in the red blood cells. It may also represent a high level of an abnormal form of hemoglobin in the circulation. If normal color returns upon warming and/or massage, the cause is due to the body part not getting enough blood supply due to cold, constriction (of the tissues or the blood vessels that supply the tissues) or some other reason. If the lips remain blue, then there may be an underlying disease or structural abnormality interfering with the body’s ability to deliver oxygenated red blood to the body.
It's either that or grape flavored lip gloss. I'm going with lip gloss.
Would this also be complicated by smoking?