A hyperbaric chamber works by increasing the atmospheric pressure inside the chamber, which allows the patient's lungs to take in more oxygen than would be possible at normal air pressure. When the pressure is raised, the oxygen molecules in the chamber become more concentrated. This increased concentration of oxygen is then absorbed into the bloodstream more efficiently. As a result, more oxygen is delivered to the body's tissues and organs, which can promote healing, reduce inflammation, and provide other health benefits. The patient typically lies down inside the chamber and breathes normally while the pressure is gradually increased and then slowly decreased at the end of the therapy session.