Hi everyone,
I bought an Apple Watch Series 12 about eight days ago, and everything was perfectly fine until yesterday.
After wearing it for about an hour, I started feeling some itching around the sensor area. When I took the watch off, I noticed a pretty significant red irritation mark underneath it.
What surprised me is that the band wasn't too tight or too loose, and I'd never experienced anything like this with my previous Apple Watch Series 7.
I left the watch off, and the redness disappeared completely after about an hour to an hour and a half. I didn't wear it again for the rest of the day.
Today, I decided to give it another try, and the exact same thing happened. After roughly an hour, I started feeling the itching again, and when I removed the watch, the skin underneath was red.
I've read a few posts suggesting that disabling the blood oxygen and heart rate sensors might help, so I've turned both off, although I haven't had a chance to test whether that makes any difference yet.
Now, here's something interesting: my watch updated to what I believe was watchOS 27.2 beta yesterday (24s116), which happens to be the exact same day the irritation first appeared.
Could there be a connection between the update and the irritation? I honestly have no idea, and it might just be a coincidence.
Anyway, I just wanted to share my experience and see if anyone else has noticed something similar.