Important to Know: A headache is normally caused when the amount of fluid around your brain fluctuates, or when you are stressed out. To stop the pain, try these steps:
Drink something with caffeine in it.
Caffeine can constrict the blood vessels in your brain, and thus it can quickly end headaches. A cup of coffee or a cola can sometimes stop a headache.

Put ice on your head.
This is definitely a no-brainer. Putting ice where it hurts makes your veins pump blood faster, helping to even things out inside your brain.

Lie down for a while.
Many headaches are simply caused by tension. If you lie down and simple calm yourself, it may go away. Taking a soothing bath or massaging your temples can often help.

Drink plenty of water.
A headache can be a sign of dehydration. You should drink a glass of water to make sure this isn't the case.

Take some aspirin.
Although some people don't like to take pills, some Tylenol is a good way to cure a headache. Aspirin contains a chemical that stop the production of prostaglandins (these are made by cells and cause pain).
