Patients with cyanosis should be asked if they have dyspnea, palpitations, what medications they would be taking, and what diet they have eaten. In patients with respiratory distress, attention should be paid to examining the throat, trachea, lungs and heart, the site of cyanosis, and the presence of pestle bar fingers. Cyanosis is a benign functional vascular disease that has no serious consequences, although sometimes there can be considerable discomfort and lesions, especially if combined with swelling and stiffness of the fingers. Generally, the condition can slowly decrease in adulthood, but it can also have persistent skin color changes throughout life. 1. Cyanosis is limited to peripheral cyanosis at the end of the limbs, the earwires, the tip of the nose and other parts of the body with low body temperature, which can be improved after keeping warm. 2.For generalized cyanosis with respiratory distress, amniotic fluid aspiration, milk or vomit choking should be considered and immediately sucked out with a suction tube and given oxygen. Give antibiotic treatment if pneumonia is suspected. 3.Immature infants with generalized cyanosis and suspected pulmonary atelectasis and respiratory distress syndrome should be given positive pressure oxygen and further clarify the diagnosis. 4.Surgical infants with cyanosis and respiratory distress or convulsions should be considered to have intracranial hemorrhage and be treated accordingly. 5.For those with general cyanosis and positive cardiac signs, congenital heart malformation, diaphragmatic hernia or tracheoesophageal fistula should be excluded, and joint diagnosis and treatment with relevant departments should be made.