Asthma and nocturnal low pulse ox

I had a sleep study for possible obstructive sleep apnea (OSA). The study showed a mild level of OSA, but also found that my baseline pulse oxygen level during sleep was 88, well below normal. I tried but failed at CPAP therapy, and now my asthma specialist says I will need oxygen therapy at night. I have read that asthma can cause low pulse ox during sleep, and that supplemental oxygen can help. My asthma was under good control for several years, but the last few have been a bit of a roller coaster. Oh well! I feel good and have normal oxygen levels during the day, am able to exercise and stay pretty active, have only had one flare requiring steroids in several months. Grateful for all of the good things.