It might take some searching to find exactly what you need, but this article is a good guide to headaches; includes a discussion about some causes of headaches.

Did you know that certain medications, including those used to treat sexual dysfunction, can be a cause of headache? Also, read how orgasm can trigger a headache.

Although relatively rare, a subarachnoid hemorrhage can be a life-threatening cause of headache; familiarize yourself with the symptoms and call 911 immediately if you experience them.

While a brain tumor can definitely be a cause of headache, headaches alone without any other neurological signs like seizure or visual disturbances are rarely a sign of a tumor.

Temporal Arteritis is a serious cause of headache in older people that may lead to blindness if untreated. See your doctor immediately if you suddenly experience pain around the temples.

Find out why too much alcohol can cause a headache and also get tips on reducing the chances of getting a headache and for dealing with one you have.

Visually pleasing page won't give you a headache and does a great job explaining some of the causes of headaches.

Did you know that the weather may be a cause of headaches? Read about changes in altitude, high winds, bright lights and other environmental causes of headaches.

Determine if a sinus infection or other ailment is the cause of your headache; fixing the problem might stop the headaches completely.

Almost everyone is familiar with migraines or tension headaches, but there are many other types of headaches with different causes. The right diagnosis is essential for proper treatment.

Headaches are universal. This informational page from Australia succinctly describes many causes of headache, some of which you might have missed.

Don't expect cutting-edge graphics, just plain facts and figures, in this powerpoint presentation about the causes of headaches in women.

Listen to the "7 Healthy Habits of Headache Sufferers" where physicians and headache sufferers address causes of headaches and ways to avoid them. Requires iTunes.

Learn about 'headache hygiene', a way to avoid common causes of headaches through lifestyle changes and identifying migraine triggers.

Even though the exact cause of headaches is still unknown, check out this new procedure that might provide relief for people who suffer from chronic, debilitating headaches.