Purple lips may be caused by respiratory diseases such as chronic obstructive pulmonary disease (COPD) and cardiovascular diseases such as heart failure, etc. It is necessary to clarify the causes and then formulate treatment programs according to the causes, as follows. 1. Respiratory diseases: such as asthma attacks, chronic obstructive pulmonary disease and other causes of purple lips, through oxygen, the use of asthma medication (dihydroxypropyl theophylline, ipratropium bromide, etc.) can improve symptoms. 2. Cardiovascular diseases: cardiovascular diseases such as heart failure, heart valve disease, etc., the use of cardiac drugs (digoxin, milrinone, etc.), diuretics (spironolactone, furosemide) and so on can help improve the symptoms. Purple lips can also be caused by other reasons, it is recommended to go to the hospital, consult with a specialist, complete chest X-ray, cardiac ultrasound and other tests to clarify the cause of the disease, and develop an appropriate treatment plan. The above medications need to be applied under the supervision of a physician.