In my opinion, you seem heavily invested in promulgating a falsehood of burns.
That’s quite an accomplishment being a doctor and dedicating your life and professional career to helping others. May I inquire what type of doctor you are? Are you board certified?
>>The posted photos, here and elsewhere, of many of the wrist lesions show a small darker red spot near the lower right margin of the red circle…just where the sensor light shines.<<
Which LED sensor are you referring to? You are aware that the watch can be oriented for either left or right wrist and also for the crown to face your fingers or your elbow? Where exactly is this spot you're referring to?
We’re arriving at different conclusions. I see very few people posting here and even fewer claiming to have a diagnosis. In fact, there isn’t a single image of a diagnosis or a prescription for treatment or anything. Personal information can easily be covered up.
Apple Support Community seems more like a hospital to me. I might go to a hospital and exclaim, Oh my lord this place is full of sick people. There must really be an issue with XYZ because I have it too. Apple Support Community in, my experience, as an over 20 year member, is like the hospital. A casual observer sees people complaining about XYZ and assume the issue is rampant. When it fact the issue is relatively rare.
Statically nickel allergies affect 18% of the population of North America or about 105 million people. When is the last time you saw a post in the discussions about having a nickel allergy? In fact, I challenge to find even one.
https://www.aad.org/public/diseases/eczema/insider/nickel-allergy
https://www.mayoclinic.org/diseases-conditions/nickel-allergy/symptoms-causes/syc-20351529