Patients with white lips accompanied by chest tightness should consider the following causes: First, cardiogenic diseases should be considered, such as patients with coronary artery disease unstable angina pectoris, myocarditis, pericarditis, infective endocarditis, hypertrophic obstructive cardiomyopathy, valvular disease of the heart, congenital heart disease, dilated heart disease, at this time will cause insufficient blood supply and oxygen supply to the cardiomyocytes, which will lead to chest tightness, The symptoms of chest tightness, shortness of breath and precordial discomfort may occur. Second, if the patient has respiratory system diseases, often in patients with acute bronchitis, asthma, large pleural effusion, pneumothorax, pleurisy, lung infection caused by various factors, this will also lead to chest tightness, shortness of breath, white lips, dyspnea, which is caused by the decrease or instability of blood oxygen saturation, third, various factors such as patients caused by shock, this will also have white lips, face cyanosis, chest tightness, and shortness of breath as clinical symptoms.