My Great Uncle died of trench foot - or the resulting infections - in WW1. It always stuck in mind from the first time my Grandma told me - so yes... go change your socks!
On a related note - is there a thread on Athlete's Foot? I had a persistent case of bad Tinea Pedis - 10 years or more with various anti-fungal creams, foot powders, steroids, the lot - nothing worked. Also got a similar thing in my hands - though much worse. I'd get deep cracks like 3/4mm deep - then infections, all the skin would come off several layers at a time....
The docs reckoned it was an allergic dermatitis so tried everything including elimination diets etc plus the creams in the world. The steroids made it worse in the end... Finally at my wits end I did my own research - looked though a whole bunch of papers and photos and eventually found a reference to the hand thing being related to the fungal foot infections. The recommendation was Terbinafine - for about two months. I went back to the doc and insisted he prescribe it for me (even though he said it wouldn't help my hands). It did. That was ten years ago now and I haven't had any problems - hands or feet since - not a thing, no athlete's foot, no dermatitis. Terbinafine (oral) will totally kill ALL fungal infections - even the most persistent. And seems worth doing stuff like this before SHTF.
Moral - do your own research when it comes to medicine and your own body. Doctors can't know it all.
