Submitted by Ted Newbury
Too many chocolate chip cookies and Snickers bars in that last care package? Red Cross Toothache Medicine helps to stop the pain caused by a cavity until you can get to a real dentist (not your tentmate, most likely). The kit comes with a relief agent (Eugenol), tweezers, and cotton pellets. (Eugenol is a local antiseptic and analgesic.)
This stuff is amazing. It is a strong anti-infection and topical painkilling agent. Also works great on foul toenails and blisters, too. Kills the pain, dries out the wound, and heals it fast.
And for crotch rot and such (including yeast infections) try good ol' mouthwash. It is very effective against bacteria; but be advised: it stings a bit.