Strange rash - any ideas?

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Hi, so I’ve noticed a strange rash in both inner forearms today (nowhere else - as yet at least!). It’s not itchy, and it’s completely flat, no virus or cold symptoms and haven’t changed my washing powder or anything - any ideas?! Thanks!

I have this as well! On my wrist!
Appeared about 2 days ago and is getting worse
No irritation from clothing, watch or bracelets
No other symptoms, I'm clueless as to its cause

My son has been to the pharmacist today with the exact same thing… he is fine in himself but a strange rash

Oh how strange! There’s lots of us out there haha. @thekewgirldid the pharmacist recommend anything?x