Thanks for the query,
You have developed an allergic reaction
to any foot wear,
Rash on both feet and itchy suggests of this.
I would like to know if you have changed any foot wear?
A photograph would also help me in giving a closer diagnosis.
Apply a mild steroid
lotion like desonide
Also take an antihistamine tablet.
This will give you some relief.
Please meet a dermatologist
for exact diagnosis.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.