Oxygen inhalation is a frequently used treatment in clinical practice, usually for patients suffering from hypoxia. Oxygen inhalation, also known as oxygen therapy, does not require the patient to breathe excessively and oxygen can be added naturally through breathing. Oxygen is usually administered using a nasal cannula, which allows the patient to breathe naturally, thereby facilitating the inhalation of oxygen into the body’s lungs, and oxygen needs to be moistened in a humidified bottle to avoid adverse reactions. If the patient has respiratory disease and has difficulty breathing, it is recommended that the patient choose to use a mask to administer oxygen under pressure to ensure that oxygen is absorbed into the lungs. In addition, patients with emphysema and chronic bronchitis should be given oxygen at low concentrations in case of respiratory failure, and should not use industrial oxygen, but medical oxygen. If respiratory failure is present, oxygen administration through a non-invasive ventilator may also be considered to achieve good therapeutic results.