My mum used to cut a strip of brown paper, soak it in vinegar, and place it on our foreheads if we got a headache. Don't know if it worked, but it left a brown stripe on the forehead!
For any stomach problems we had Dr Collis-Browne's Mixture, consisting of peppermint oil and morphine, it was lovely and soothing and worked every time. I still use it to this day, but they have taken nearly all the morphine out so it's not half so effective lol!
For a sore toe with a fungus infection Vick's Vapour Rub is a surprising remedy, and it really works.
During the war most of us kids got styes, and mum's remedy was to rub it with her wedding ring.....huh???