I've written a blog post on health and medicine in Elizabethan England. There were some rather, er, interesting remedies back then including putting a piece of onion up a man's "yard" if he was having trouble retaining urine. But that's not the scariest part - if no onion was available, 2 or 3 lice should be used instead! Not sure what they did for women and I don't think I want to know.