@barbiet I would suspect that you are experiencing an allergic reaction. Based on my experience with poison ivy, a bad severe reaction can look like burns.
I think having the watch a little too tight along with a buildup of moisture can also cause some irritation. I normally wear the watch on my left wrist but switch it to my right at night. What the watch monitors during sleep isn't wrist dependent. This gives the skin on my left wrist some rest and recovery time.
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