Purple lips in pregnant women may indicate inadequate oxygen supply, which may lead to hypoxia in the fetus and usually requires treatment. Purple lips in pregnant women may be caused by poor blood circulation, such as pregnant women suffering from anemia, heart disease, in colder weather, because of the body’s poor blood circulation, the lips will appear blue and purple. Also, purple lips may occur when a pregnant woman suffers from gestational hypertension or digestive disorders such as constipation or loss of appetite. If the pregnant woman has the above mentioned diseases, it may lead to fetal growth and development restriction, and may even lead to intrauterine distress, etc., which will have an adverse effect on the fetus. Therefore, once the above conditions occur, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, complete the relevant examinations to clarify the cause of the disease and treat the symptoms.