St John's wort was used as a healing herb much before it became known as a herbal 'anti-depressant'. This oil can be mixed with other vegetable oils and essential oils to make a massage rub in joint and muscle problems and nerve pain, or it may simply be used on its own. A traditional use of St. John's wort oil for shingles, where the lesions are clearing but there is still pain.Always do a patch test before using any new external application.