The normal lip color is pink, but of course there are some differences in the shades of lip color for physical problems. If the mucous membrane of the lips is white, we should be alert to the possibility of anemia, which can be assessed with the color of the lid conjunctiva, and if there is poor appetite, weakness, and a vegetarian diet in general. It is recommended that a routine blood test be performed to check the hemoglobin status. If the lips are purple, be alert to the lack of oxygen, such as gas poisoning, the lips appear cherry red, the situation should pay attention to the history of excessive inhalation of carbon monoxide, this situation requires hyperbaric oxygen therapy.