My normal sats are between 87 and 94 and can drop very low during activity. I have recently become aware that when I feel unwell or breathless whilst resting without oxygen, my sats can be as high as 99! The last time this happened I ended up in hospital for 8 days with an exaserbation. But no one could explain the high sats readings. I end up on IV antibiotics nebuliser etc. and was discharged with my normal sats around 92 and feeling loads better. is there any one in this amazing community who has experienced anything like this or has an idea of the cause.