Black Walnut has been used successfully to help promote healing in cases of poison ivy, ringworm, and other skin disorders. Black Walnut can be used as a poultice or taken internally to help restore tooth enamel.
 
It has also been used for:
Boils
Milk: Dry Up
Eczema
Lupus
Diarrhea
Parasites
Cold Sores
Herpes