Why do smart watches like FitBit and Apple Watch cause burns or skin irritation under the flashing sensors? - Quora
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Garmin watch optical HR sensor burning skin - Forerunner 230/235 - Running/Multisport - Garmin Forums
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Skin HR Sensor Rash/Irritation/Burn - SOLUTION for the problem - Instinct - Wearables - Garmin Forums
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