Hi, Merry Recluse! I had a headache almost every day for the first 15 days or so and it usually came on in the evening. I found that lots of water, very little caffeine during the day, naps in a cool dark room, ibuprophen, and baths with epsom salt helped. I do get migraines, so at one point I did have to take my migraine medicine. If they persist, I would go see your doctor.