The medicinal uses of ginger is almost endless. If you can stomach the spiciness, it does wonders in treating many disorders.
Menstruation disorders: Pound a piece of fresh ginger and boil with a cup of water and add a little honey to taste. Drink it hot two or three times a day for a month. The pain-relieving and anti-cramping compounds in ginger effectively help relieve painful menstruation cramps (dysmenorrhoea). In the absence of menstruation in women in the reproductive age (amenorrhoea), this concoction can also help induce menstruation.
Comment from Leslie
There is a lot of great information on this site. The benefits of Ginger use are outlined alphabetically. I just posted the paragraph on Menstruation Disorders.