Black Walnut has been used successfully in a tincture for poison ivy, ringworm and other skin disorders. It may also be used as a poultice or taken to help restore the enamel. This herb has aided the following problems, conditions or breakdowns: Boils Lactation Poison Ivy Cold Sores Leucorrhea Syphilis Diarrhea Lupus Teeth Eczema Mouth Sores Vagina Herpes Parasites