Inadequate oxygen supply usually means that the vital organs and other organs of the body are in a state of oxygen deficiency and are unable to carry out their normal functions effectively. The main organs that normally supply oxygen to the body are the heart and the lungs, and lesions in these two organs can lead to an imbalance in the body’s oxygen supply and demand, resulting in adverse conditions. The underlying clinical cause that can cause insufficient oxygen supply may be the underlying lung disease. The lungs are the place where the body directly exchanges oxygen. If there are underlying diseases in the lungs, such as interstitial lung disease, pulmonary embolism, chronic obstructive pulmonary disease, etc., they may lead to abnormal oxygenation and hypoxemia, leaving the body in a state of hypoxia, and the patient may have clinical symptoms such as dyspnea, decreased activity tolerance, cyanosis, and weakness. In the long run, patients may also develop pulmonary heart disease, which seriously affects the quality of life of patients and requires active treatment to improve the insufficient oxygen supply. If the patient itself has coronary artery stenosis, it will lead to myocardial ischemia and hypoxia. When the myocardium is in a state of ischemia, hypoxia and heart failure, it will cause its cardiac output to drop, which will lead to ischemia and hypoxia in the surrounding organs and a state of insufficient oxygen supply, and the patient may have corresponding clinical symptoms such as chest tightness, chest pain, dyspnea and weakness. In addition, if the body is in severe anemia, the oxygen supply will also be insufficient due to the decrease in the oxygen-carrying hemoglobin content in the blood. If the oxygen supply is insufficient for a long time, it will lead to memory loss, insomnia, dreaminess and other symptoms, and in serious cases, coma and dementia, which may even affect the life.