![Apple Watch Series 6: Why Apple added a sensor to tell how much oxygen is in your blood as its big new feature – and what it means | The Independent Apple Watch Series 6: Why Apple added a sensor to tell how much oxygen is in your blood as its big new feature – and what it means | The Independent](https://static.independent.co.uk/2020/09/21/16/Apple_watch-series-6-sensor_09152020.jpg)
Apple Watch Series 6: Why Apple added a sensor to tell how much oxygen is in your blood as its big new feature – and what it means | The Independent
![TJ on Twitter: "after noticing my Apple Watch was giving me a blister on my wrist - I haven't worn it at all in the last 24 hours. This evening more marks TJ on Twitter: "after noticing my Apple Watch was giving me a blister on my wrist - I haven't worn it at all in the last 24 hours. This evening more marks](https://pbs.twimg.com/media/DRrd5FgX0AASRSk.jpg:large)
TJ on Twitter: "after noticing my Apple Watch was giving me a blister on my wrist - I haven't worn it at all in the last 24 hours. This evening more marks
![Does anybody have any experience with an Apple Watch doing this? That red irritated circle was under the actual watch not band. : r/AppleWatch Does anybody have any experience with an Apple Watch doing this? That red irritated circle was under the actual watch not band. : r/AppleWatch](https://i.redd.it/a93q28pu0ja31.jpg)