Apple Watch - blood oxygen 84% during sleep?

[Sarahjsxx]

Has anyone else had low dips like this? Usually it is around 90-100 whilst asleep, I've been tracking my sleep for the last 3 months. This week on one day it went o 88% and last night 84%, if something was wrong would it have been happening often and more than once?

Sleep apnoea?

Yes that. Mine went down to 78% at night once, I cut down on alcohol and it then stayed mostly between 90 and 100 overnight.

Yes I'm worried about sleep apnea, I don't drink alcohol now so not sure what can have caused :( don't want to go to gp if it's for nothing and may have been an error

Ditch the watch and you will sleep so much better!

The blood oxygen thing is nuts. Ignore it.

Do you ever sleep on your arm in some way, because that would definitely affect the blood oxygen levels?

I have a Garmin and it gets the odd downwards spike (which often correlate to times I know was leaning on my watch arm pissing around on my phone but it has tracked me as asleep) with generally decent levels at other times.

Why are people saying its nuts? If its usually normal I would consult gp.

I only bought the watch for tracking steps I didn't know it had all these other features but I've got it now, it could be possible but I usually sleep on my left side and the watch is on my right wrist but that could be an explanation