Purple lips may be due to abnormalities in the respiratory system, cardiovascular system or blood system.
1. Purple lips is cyanosis (purple and black color of the lips), which is caused by the lack of oxygen in the blood, resulting in an increase of reduced hemoglobin in the blood, and can be manifested as cyanosis of the skin or mucous membranes. There are three main types of causes for this phenomenon, including respiratory, cardiovascular, and hematologic abnormalities.
2. Respiratory causes include obstructive emphysema, lung infections, and acute pulmonary embolism. All of these pulmonary diseases can cause pulmonary ventilation and hyperventilation dysfunction, resulting in insufficient oxygen saturation and increased reductive hemoglobin, causing purple lips.
3. Cardiovascular diseases, including congenital heart diseases such as ductus arteriosus, ventricular septal defect, atrial septal defect, etc., can also cause dry skin, which can be manifested as cyanosis of the lips.
4. Hematologic diseases such as methemoglobinemia, which can cause decreased oxygen-carrying capacity of hemoglobin, can also be manifested by cyanosis of the skin and lips.
5. Long-term hypoxia in highland areas can also cause purple lips. The human body by the cold stimulation, lip capillary contraction also have such performance.
In summary, the phenomenon of purple lips, you can go to the hospital to consult the doctor for help.