Itchy red spots on feet

[porsmork]

Is this athlete's foot or something else? I've been treating with athlete's foot talc, but doesn't seem to be getting better. Not worth a trip to the gp, but I'd like to know!

I get this (or something that looks like this).
I've had it checked by a dermatologist who took samples and it's nothing fungal.
They made me write a diary of occurrences and it turned out usually get it when I'm stressed and/or my immune system is weakened.

Do the spots stop itching, when the skin is broken (with scratching)?

Chilblains probably