Lips purple and black may be eating mulberry and other foods or environmental factors such as lack of oxygen, may also be caused by cardiac insufficiency, pulmonary insufficiency.
1. A large number of eating mulberry, purple cabbage, blueberries and other foods lead to food and pigment residue in the lips, so it looks like the lips are purple and black, generally in the cleaning of the lips can be restored to normal color; living at high altitude due to the low oxygen content of the air, the body cells of the chronic hypoxia and the emergence of black and purple lips.
2. Cardiac insufficiency: congenital heart disease, myocardial infarction, arrhythmia, pericardial effusion and other factors cause cardiac hemodynamic disorders, ventricular systolic function is reduced, the heart pumping blood to reduce the ischemia and hypoxia of the tissue cells, so the lips black and purple.
3. Pulmonary insufficiency: severe chronic obstructive pulmonary disease, idiopathic fibrosis, acute respiratory distress syndrome and other lung diseases lead to pulmonary ventilation, hyperventilation, blood oxygen saturation decreased, and thus the lips will be purple-black.
Purple-black lips may be related to a variety of factors, it is recommended to seek medical attention to clarify the diagnosis.