answer:How do you know it is tension? Are you sure you have not skipped caffeine today? If it is tension, I would take 2 Ibuprofen (400mg total) if you are under 120 pounds, 3 if you weigh more, with a glass of water and a little something to eat, to protect your tummy, can be a couple crackers. In 50 minutes headache should be gone. Best if you can also relax your eyes, maybe take a bath. If it is that you missed caffeine intake at lunch time, drink a little coke or equivalent, or have some tea or coffee, and take the advil.