Hyperbaric oxygen therapy, also known as the administration of pure oxygen at an increased pressure much greater than atmospheric pressure, is the gold standard for treating decompression sickness (DCS). It lowers the bubbles in the circulation, saturates the body tissue with extra oxygen, and brings down the potentially life-threatening swelling. As a general rule, you must seek treatment as quickly as possible since the symptoms of DCS may pose a serious risk to one's life.