Oxygen therapy is a medical treatment that involves administering oxygen to patients who have low oxygen levels in their blood. It is commonly used to treat conditions such as chronic obstructive pulmonary disease (COPD), asthma, pneumonia, and other respiratory disorders. Oxygen therapy can be delivered through various methods, including nasal cannulas, masks, and ventilators. The goal of oxygen therapy is to increase the amount of oxygen in the blood, which can improve breathing, alleviate symptoms, and prevent complications associated with low oxygen levels. This treatment is typically prescribed by a healthcare provider and may be used in both short-term and long-term settings, depending on the patient's needs.