My girlfriend doesn’t have Reddit so I am posting this on her behalf… the other day I saw her watch blinking while she was napping. Like a flashlight almost. I didn’t think anything of it (possibly related?) but today she said her watch has been leaving a burn on her arm.. maybe this is due to some sort of sensor issue? Maybe it’s malfunctioning and scanning her skin more than it should? Idk how they work.. In any case this seems like a huge issue and we will be going to the Apple Store ASAP to address it..
Looks like a fungal infection called ringworm. Not uncommon. Just go get some over-the-counter antifungal cream and apply as directed on the box.
And also put on athletes foot cream to prevent it from spreading to your feet, or you’ll start a cascade of problems. They’re the same thing just different spots.