The most common clinical cause of white lips is anemia. In addition to white lips, anemia will have other corresponding symptoms, such as the patient will have weakness, apathy, the digestive system will have nausea, vomiting and other related symptoms, and the patient may have dizziness, tinnitus. Therefore, we should check the blood routine of the patient, and if it is determined to be anemia, we have to consider what kind of cause of anemia. The causes of anemia include blood loss anemia, nutritional anemia, anemia caused by abnormal hematopoietic function, and hemolytic anemia. The treatment of anemia is different according to the different causes, and the corresponding treatment should be carried out according to the different causes. Clinically, there are other factors that lead to white lips, such as sympathetic overexcitation caused by various reasons, which can lead to transient white lips. For example, patients with severe pain, gastroenteritis, myocardial infarction, may lead to white lips. However, this is caused by over-excitation of the sympathetic nerves and vasoconstriction, and the patient usually recovers within a short period of time. If white lips occur for a long time, the most common is still anemia.