Does anyone know how to relieve a headache without taking any sort of medication?

你 can stay in a dark room 或者 cover your eyes for 15 to 20 minutes
also 你 can drink some 茶 if 你 like

Stop using anything electronical, drink lots of water, lie down in a dark room in complete silence and try not to think. This is what I do and it works :)

Try doing yoga 或者 meditating ..imagine that your are the lotos and clean your aura.

Drink lots of water. Headaches are often caused 由 lack of moisture in the brain. 或者 something like that. (derp-level biology)

Lay down for a while. You'd be amazed how much a little rest can help. Opening up a couple of windows helps a great deal to.

But in the end, unless you're allergic 或者 something like that, I would 建议 你 to take an asperin. The effects of asperin kicks in after about 30 minutes. Always works for me. On a 秒 thought, take in the aspirin right away, and perform the above things I mentioned. That oughta be the best way to get rid of a headache.

Don't worry, medicine isn't that bad. Unless 你 have an allergy.

Good luck.