Medicine: The leafy stems are used as a steam bath switch and/or a poultice to treat aches and pains, sores, cuts, boils, abscesses, toothaches, and broken bones. People also crush the raw roots, wrap them in a hot, moist cloth, and place them on an afflicted area. A tea made from yarrow can be used to relieve cramps, stop internal hemorrhaging, treat heart and kidney problems, relieve hangovers, and ease the side effects of cancer treatments. Drops of the tea can by placed in the eyes and ears to treat ailments. The tea is also said to heal uterine complaints and provide cleansing after childbirth. Breathing the steam from heated northern yarrow plant clears the sinuses.