As an herbal medicine, yarrow has a wide range of uses. Historically, yarrow was prized for its astringent effects on wounds. When mashed and boiled to extract oils, yarrow has been used to treat inflammations and headaches. Yarrow is taken both internally and externally. The flowering tops of yarrow, which have been used as snuff historically, are said to be the plant's most healing part. Today, yarrow is used to treat colds, influenza, allergies, fevers, coughs, and sore throats.

Yarrow is a herbaceous perennial flowering plant native to Europe and parts of Asia, but found worldwide. This ingredient is known amongst herbalists as a potent agent and has credibility amongst the professional health community as well. It is known as an astringent and helps intensify the soothing actions of other herbs, bring perspiration to the "fevered," cleanse the system and bolster the body's natural defenses. When applied topically, yarrow helps reduce the oiliness of skin, allowing the skin to remain moist without greasiness. For this reason, it is often used to treat eczema. Yarrow is also often used in chest rubs for colds and the flu. It is also purported to decrease healing time for bruises.