Thyroid UK
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oxygen levels

anyone have or know why my oxygen levels will go from 99 to 92?

my lungs are working fine as had a lung function test last week and nurse said 110%

i mentioned oxygen levels dropping and she said if they get to 91 and stay there then id have to go to the hospital

i have been told vit A and D may help but keep forgetting to take them

it does make my anxiety worse and ive tried leaving the oximeter alone but feel ill if i cant check myself

treadmill test and heart scan a few months ago showed everything was fine

7 Replies

Don't know why it does that but mine tends to do the same. It happens more often when I'm lying in bed at night, I think it is because I'm kind of under the covers and not moving about much so I'm just breathing in the air I've just breathed out if you know what I mean. I find if I take a few really deep breaths I can push the oximeter reading back up to 99 again. Obviously because I've been breathing more deeply.

I find it more fascinating than worrying though. Maybe you need to try to take your vits A& D regularly for a while and see if that does help. Don't know what thyroid meds you take but keep your Aand D beside them and get int the routine. Sounds like you have been thoroughly checked out though so that is good.

Why don't you try to wean yourself off checking your readings? Maybe choose a certain time or times in the day when you will do it and stick to that time -then reduce the number of times you do it until you only do it once. Dont do it when you are lying in bed though because if it's like mine it will probably be low and that won't cheer you up. Good luck with it.

PS - what about swimming or singing to expand your lung capacity. Are you asthmatic or anything like that, if so ask your surgery asthma nurse to help you to work out how to get the best from your inhalers.


There is a theory that asthma is caused/distinguished by OVER breathing. Mine pretty much went away when I stopped breathing through my mouth (even out). No idea about oxygen levels though. My lung function tests (where you blow into a tube) were always appalling and never reflected how I felt one way or the other.


I've heard that too, I don't think I'm over breathing though, that must be must be how Buteko system works, from what I've seen I think it sorts out your breathing.

Since I got myself a new asthma nurse recently and for the first time in 20 odd years a peak flow puffer and started using my brown inhaler 'properly' I have to say I feel miles better - I was going to say 'it's amazing' but it's not really is it!

My scale on the peak flow always seems to match up to how I'm feeling though. First time I ever did one many years ago my result was so awful the doctor said 'that's useless do it again properly.'

Considering the whole point of me being there and being asked to blow into it was because I had no puff I had to laugh.


I did Buteyko (not very well!), increased D3 and B12, took MSM for extra sulphur, got rid of gluten and now don't get asthma (after about 50 years of it). I ditched the steroid inhaler about 30 years ago because I had permanent oral thrush and sore throat - and it made no difference to number or severity of asthma attacks - GP didn't notice. I was doing 10 puffs a day of salbutamol in 2009-10.


My husband had asthma all of his life until probably the last ten years or so - he's nearly 70 and now he's like you. Takes nothing at all and is perfectly fine. I on the other hand only developed it about 15 years ago. So now instead of him puffing away its me and now that I'm doing it properly I realise how awful I was when I was doing things my way! The nurse said I was a 'coper' I think that was a nice way of saying I was an idiot for not using my inhaler properly. I blame teaching and joke that I've got chalk dust on the lung - dates back to when I used to whack the blackboard dusters with a ruler or against a wall to clean them.


I wouldn't worry too much - does it seem to be related to when you've been sitting, or moving about? 92 is not worryingly low. Have you tried putting the thingie on another finger or on a toe / earlobe? It sounds postural to me, or due to having short periods where you simply haven't been breathing very deeply.


I've been thinking about you since you posted - I wondered if your oximeter is perhaps reading low for some reason - could you get it checked out with one in your surgery like you can with BP machines?

Also could the sensor in it be needing a clean. I also googled around to see what I could find and there's quite a lot there about oximeter that's where I read about the sensor maybe needing cleaning or not reading correctly for one reason or another.

I think Jazzw, suggestions are possibilities too and 92 doesn't seem to be worryingly low but I'm NOT medically qualified it was just something I saw on an oximeter training manual thing I found online - could you be a bit anaemic that can affect the readings too?


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