Well for me personally, for the last year I have had low O2 levels but it didn't affect me so no one was concerned. It wasnt until this spring when it began affecting me as my lungs got worse. It was excrutiatingly exhausted, you wouldn't beleive it. I would sleep for 12 hours and wake up feeling like i hadn't slept for days. I would fall asleep at work, while driving. Another indicator to me that i had low O2 was reading that it can cause nightmares, which i began experiencing. I'd have dreams that i couldn't breathe, it was terrible.
It wasn't just being eye-tired, when you can't keep your eyes open: it was physical exhaustion as well. I felt like a wet bag of heavy sand. Every limb was heavy; i had no desire to do anything or go anywhere; i had no motivation, i just wanted to sleep. My body just wanted to lay on the couch. Getting up was a huge task.
Since beginning O2 i feel MUCH better. I am still tired for the most part (as i am only on O2 at night) but that's also b/c my lungs are so bad. My tiredness is tolerable however.
Also, i would notice if i would walk or do anything physical (especially shower!) my legs felt like they'd give out from me at any moment. I still have moments where my knees will give out and i'll kind of bounce. Also, i would get random pains in my body, which my doctor informed me was my body's demand for O2 but i couldn't provide it with. She described it as trying to fuel a machine when you have nothing to give it. It's demanding more than you can provide, and thus you get pain and pulled muscles b/c they're running on nothing.
I hope that was of some help! Feel better!
It wasn't just being eye-tired, when you can't keep your eyes open: it was physical exhaustion as well. I felt like a wet bag of heavy sand. Every limb was heavy; i had no desire to do anything or go anywhere; i had no motivation, i just wanted to sleep. My body just wanted to lay on the couch. Getting up was a huge task.
Since beginning O2 i feel MUCH better. I am still tired for the most part (as i am only on O2 at night) but that's also b/c my lungs are so bad. My tiredness is tolerable however.
Also, i would notice if i would walk or do anything physical (especially shower!) my legs felt like they'd give out from me at any moment. I still have moments where my knees will give out and i'll kind of bounce. Also, i would get random pains in my body, which my doctor informed me was my body's demand for O2 but i couldn't provide it with. She described it as trying to fuel a machine when you have nothing to give it. It's demanding more than you can provide, and thus you get pain and pulled muscles b/c they're running on nothing.
I hope that was of some help! Feel better!