People have tried to find cures for hair loss for thousands of years. In an effort to get their hair back, men have tried "cures" like applying strange lotions or even having their heads packed in chicken manure. Many unproven "cures" are still marketed today. It is only in the last decade or so that treatments have been developed which do sometimes work. Some doctors do hair transplants, where they take tiny plugs of hair from areas like the back of the neck and plant them in the bald spots on the head. Some drugs have been tested and approved for sale as hair loss treatments. They encourage hair regrowth and thickening, but work better if applied before hair loss turns to baldness.