Hyssop (Hyssopus officinalis) oil kills lice and takes away itching of the head.

Try pure essential oil of hyssop. You can probably find it in an herb shop or health food store. Mix equal parts of the essential oil of hyssop and a carrier oil. Olive oil or canola oil are good choices as a carrier. In other words, if you purchase 1/4 ounce hyssop oil, mix it with 1/4 ounce carrier oil. Pure essential oil of thyme would be a good second choice. Mix it in the same manner as the hyssop, but not in combination with it.

Apply the hyssop mixture or the thyme mixture directly to the scalp. Wrap the head with a scarf and wait for at least one hour then shampoo as usual. This treatment should be repeated once a week until all signs of infestation are gone.

This should do the trick! According to the noted herbalist, Nicholas Culpeper, hyssop oil will kill the lice.