Multiple issues on left foot

Hi all

just looking for a bit of advice/pointers if possible. I have multiple issues with just my left foot. These would include:

Nail infection on 3 nails.
Dry cracked heels
Heat rash
I also typically suffer with athletes foot frequently.

the strange thing is though i have nothing on my right foot as in literally it could be somebody else’s foot!

Any thoughts or ideas as to why this may be happening?