When I was in labor my baby's pulse dropped really low. they put me on oxygen then. lucky it went back up they almost had to do a emergency c section but every thing went ok.
I use oxygen every night for sleeping, only because I'm a very shallow breather and doc says I must. Other than that, only while in the hospital. COPD stinks!
I get pneumonia really bad, and one time it was so terrible that my airway closed so much that I had what I'm pretty sure was an asthma attack. (I'd had two before that, but I tend to block how it feels from my memory.) Anyway, after a four hour Nebulizer treatment, I was put on oxygen until I got my breathing back under control. On the upside, I was already in the ER getting X-rays when it happened. On the downside, the staff got distracted by a patient that had passed away, told me I wasn't sick, and released me. The next morning, I was back.
I do NOT like to have masks on my face ..
but it was necessary.
Altitude sickness is not fun.
I just don't get mine from a machine...