Cyanosis, also known as cyanosis, is a diffuse bruising of the skin and mucous membranes. Cyanosis occurs when the blood circulation is poor and the concentration of reduced hemoglobin in the blood is too high, causing the skin and mucous membranes to turn cyanotic. Therefore, cyanosis is more common in circulatory endings where the skin is thinner and less pigmented and the capillary network is richer, such as the lips, nose tip, cheeks, auricles, and dental cavity. Cyanosis can be temporary or purely long-term, and the severity is often influenced by temperature, mood changes, etc. Patients who encounter cyanosis should be asked about any respiratory distress, palpitations, what medications they would be taking, and what diet they have eaten. In patients with dyspnea, 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. The condition generally decreases slowly in adulthood, but persistent skin color changes can occur throughout life. The prognosis for limb and life is good without limb nutritional disorders, ulcers or gangrene. Preventive measures include: 1. Physical exercise should be strengthened to enhance physical fitness. Quit smoking and avoid drinking tea and coffee. 2, lift the burden of thought, adhere to self-massage; prevent cold and keep warm, prevent frostbite. For the newborn baby related health care methods include: 1, for the newborn baby cyanosis, to give timely oxygen treatment. Cyanosis indicates a lack of oxygen in the body, which may cause damage to the brain, heart, kidneys, lungs and other important organs of newborns, thus affecting their intelligence and physical development. 2, in the home, you can produce oxygen to meet the newborn’s need for oxygen. But be sure to choose absolutely safe equipment and equipment, and the oxygen producing agent should be free of any side effects. The use of home oxygen concentrator to win time for the rescue of newborn oxygen deficiency, to avoid irreversible damage to organ development and intellectual development due to the long time of oxygen deficiency. 3, in the care of newborns should pay attention to keep warm, keep the airway open, prevent milk and vomit choking trachea.