Yarrow is a beautiful flower that shares twin meanings of healing and love . In the language of flowers, Yarrow's symbolic meaning is traditionally associated with healing Yarrow is an herb. The above ground parts are used to make medicine. Yarrow is used for fever, common cold, hay fever, absence of menstruation, dysentery, diarrhea, loss of appetite, gastrointestinal (GI) tract discomfort, and to induce sweating. Some people chew the fresh leaves to relieve toothache. yarrow can be used internal and eternal.