Blue vervain is a VERY bitter herb with VERY potent medicinal qualities! Blue vervain acts as a nervine, bitter, mild sedative, relaxant, diuretic, and more. Blue vervain is typically recommended for Type A personalities. Those who are. "tight-necked, over-achieving, list-makers, who can’t ask for help.” as Thomas Easley says. It can be used for those who make lists, have a hard time saying no, are strong in words and action, and have trouble sitting still. Blue vervain can help those who have nervous or tension headaches, irritability, muscular tension, inflammation, and insomnia. Blue vervain can also be used for those with anger fits, muscle spasms, PMS symptoms, digestive issues, and tension help specifically in the neck and shoulders. If you hold tension in your neck and shoulders, as I do, then blue vervain is the herb for you!