Osteonecrosis is one of the 14 medically-approved conditions for using hyperbaric oxygen therapy. Hospitals and medical centers will typically treat this condition with daily sessions at 2.4 to 2.5 ATA. These higher pressures (above 2.0 ATA) can give rise to a greater incidence of complications, including oxygen toxicity. Bearing this in mind, the standard protocol remains 2.4 ATA due to it’s effectiveness. In this case report, a 36 year old female was not able to pressurize to these higher depths and instead could only get to 1.6 ATA. She continued daily sessions at 1.6 ATA and after 20 sessions, her symptoms were relived significantly. After 50 sessions, her symptoms were relived almost completely. Both CT and MRI imaging confirmed this successful intervention. This publications should give rise to more research on pressure protocols <view study>