Rash in wrist F19

Rash in wrist

I have this rash on my wrist and it's itchy. Also it's not lots of rash, it's just one dot on the wrist and it's been more than I week I think of having it. I also wear watch (silicone bands) and put perfume on that specific part of the wrist, and idk what's causing it? Is it normal? TYIA