Oxygen intake at home is beneficial for lung cancer, which can relieve hypoxia and improve symptoms. 1. Relieve hypoxia: Early lung cancer symptoms are usually not very obvious, and some patients may have no clinical manifestations, but with the development of the disease, the cancer cells will affect the lung function, resulting in the decline of oxygen exchange function of the lungs, and the patients will have the symptoms of lack of oxygen in the body and hypoxemia, which can be relieved by inhaling oxygen to alleviate hypoxia. 2. Improvement of symptoms: middle and late stage lung cancer patients may have chest tightness, dyspnea, chest pain, sitting breathing, inability to lie down, etc. Oxygen inhalation can also relieve these symptoms. At the same time, patients should strengthen nutritional support, give high protein, high calorie, high vitamin and easy to digest food, and animal and vegetable protein should be reasonably matched, such as egg, chicken, soybean and so on. Maintain sufficient rest, avoid respiratory tract infection, and enhance the ability to resist diseases. Lung cancer should formulate specific treatment measures under the guidance of physician’s face-to-face consultation, and should not use medicine by oneself to avoid aggravation of the condition.