Please help Pulse ox is not working

Pulse Ox is only automatically measured at night (if you have it set that way in Menu>Activity Tracking>Sleep Pulse Ox). You can also take a measurement manually with the Pulse Ox widget.

I turned it off on mine because I didn't find it to be accurate or useful, and it just used up battery life overnight.

Scott12345, thank you for responding. I thought it might be more insightful than it is. I can do without it. Have a great day. 

I think most people disable it, unless they are in an environment (high hill climb) or medical condition that makes it important to see it, because fir most of us it's an irrelevant number and it uses lots of battery.

I don't know if I would trust a watch if I had any if the above reasons to worry about...