I READ ON ANOTHER FOPRUM WHERE A LADY SAID SHE GOT SOB SO SHE TURNED HER OXYGEN UP FROM 2 TOO 3 LITRES BUT THEN SHE WAS GETTING A HEADACHE. SHE TOLD HER PULMONOLOGIST ABOUT IT & HE TOLD HER SHE SHOULD NOT TURN IT UP CAUSE THE CARBON DIOXIDE IS WHAT YOUR HAVING PROBLEMS GETTING OUT OF YOUR LUNGS .NOW THIS KIND OF MAKES SENSE BUT WHO'S RIGHT I ALWAYS THOUGHT YOU SHOULD KEEP YOUR LEVEL OF SATURATION UP.