HBOT is contraindicated in patients with severe claustrophobia, COPD, patients with pacemakers, uncontrolled hypertension, COVID-19 infection and / or symptoms of COVID-19 infection.  Woman who are pregnant should NOT undergo HBOT.  If you are suffering from congestion or sinus issues, it’s best to postpone the treatment until you are feeling better.
If you see a specialist such as an oncologist, neurologist, cardiologist, pulmonologist, or are currently under care for a health issue or surgery, you will likely need to seek medical clearance from your provider prior to beginning your treatments.