Vervain aerials have been used traditionally for countless conditions, including stimulation of lactation and treatment of dysmenorrhea, kidney stones, jaundice, anxiety, gout, headache, depression, and insomnia. Used as a poultice or ointment, vervain is considered a natural remedy for bruises, skin infections, insect bites, eczema, and other skin disorders. It has also been used to alleviate sprains. Vervain is also an astringent, a bitter digestive tonic and a diuretic.