Rub a few drops of oil of rosemary into your temples. Rosemary helps keep blood vessels dilated.
Make a rosemary tea using one teaspoon of rosemary in a cup of hot water; cover and steep for 10 minutes; strain and sip a cup three times a day.
Drinking peppermint tea works well for headaches too. I've heard that peppermint will dispel parasites. However, I've also heard that it won't work if you do it too often. Apparently, the parasites get wise to it.