You can be allergic to silicone, but that looks like a sweat rash to me. I’d guess that your watch was pushed too far up your arm and the sweat couldn’t escape. I’ve had similar with my metal strapped watch on hot days where it’s been too tight on my wrist.
Rochdale - Grooming gang leader released from jail today
What’s a household item that reminds you of your grandma’s house?


