At times, there are symptoms of oxygen starvation
, feeling of unwellness, and sometimes, fingernails, lips go blue. More recently, there was such an episode and the palm of my right hand went blue. I know that when this happens, my oxygen sat goes down because once, I went to A&E, explained the symptoms. The doc took my oxygen sat and this was down to 90%. It was probably much lower, because by the time I saw the doctor, symptoms had subsided.
Any idea what these are.