Hyperbaric oxygen therapy (HBOT) works to treat infections by increasing the amount of oxygen in the body's tissues. When a person receives HBOT, they breathe in 100% pure oxygen while inside a special chamber that is pressurized to two to three times the normal atmospheric pressure. This high-pressure environment allows the lungs to take in more oxygen than they would at normal pressure, and the increased oxygen is then carried throughout the body by the bloodstream. The increased oxygen levels in the body have several beneficial effects that can help fight infections. First, oxygen is essential for the body's immune system to function properly, and HBOT can help boost the immune system's ability to fight off infections. Second, many bacteria and fungi that cause infections are anaerobic, meaning they cannot survive in high-oxygen environments. By exposing the body to high levels of oxygen, HBOT can help kill these anaerobic pathogens. Additionally, HBOT can help promote healing of infected tissues by increasing blood flow and oxygen delivery to the affected area. This increased blood flow can also help deliver more white blood cells and other immune cells to the site of infection, further aiding in the body's ability to fight off the infection.