Herbalists call ginger a warming herb because it heats the system.
The herb acts as a peripheral circulation stimulant. Having been used for centuries, ginger roots is known to treat bad circulation, fever, upset stomach, cramps, fever, and dandruff, just to name a few. It is sold fresh, freeze dried, in capsules, as extract, and in tea form. I find ginger root in the fresh form to be most effective. To make a ginger tea, use one grated tablespoon of ginger root to an 8oz cup of boiling water and let steep for five minutes.