Hey ! I have a red spot !
It's small its not an erythema but it's clearly a red spot.
After 4 hours I removed the patch (I consider my Pois symptoms often comes after 4 hours).
But 2 hours later (4 + 2 = 6 hours after patch), the red spot came.
I think it's possible I'm positive.
I took photos, I will post them later (I lost my account).
It looks like something like this :