Yarrow is an aromatic herb that grows in meadows. It has alternate, wooly gray-green fern-like leaves, and its tiny, white flowers each have 4-6 ray petals that grow in flat-topped clusters. Put the leaves or flowers on wounds or a bloody nose to quickly stop the bleeding. Use a wash on rashes, runny sores, boils, poison ivy, chapped or cracked skin, and hemorrhoids. Drink to relieve indigestion and gas. Yarrow promotes sweating when taken to reduce a fever. It is also said that the smell repels mosquitoes.