It relieves the thirst caused by the fever, but makes the individual perspire which helps to eliminate poison through the sweat glands and kidneys. The flower tops can be made into a lotion for the body that helps reduce fever. Yarrow never debilitates the patient and has tonic qualities that help to purify the blood. It's also used to help digestion and was well known by the Shakers as a digestive and general tonic. As a cosmetic, yarrow makes an effective skin cleanser and toner because of its astringency.
Yarrow tea made with flowering stems is said to be beneficial to oily skin.
The plant is native to Europe and was naturalized in North America. Common yarrow is found in pastures, roadsides, embankments, and waste ground. Leaves are aromatic and finely divided, clasping the stem toward the top, while the lower leaves are stalked. Millefolium refers to leaf segments. If picked on hot days, it is said the leaves feel very cool and are fragrant.