Last year, the International Headache Society published a study that found "overuse" of over the counter medicines as a major contributing factor to frequent migraine headache attacks. "Overuse has less to do with how many pills you take to relieve a single headache than with how often you take them," explains Dr. Robert Kunkel, a headache specialist at the Cleveland Clinic Headache Center. "If you get more than two headaches a week and take pain pills for them, you're at risk." Studies showed that pain relievers with caffeine, like Excedrin, were some of the worst culprits for exacerbating proclivity to migraines.

Tension headache symptoms are thought to come about as a result of tension that settles in the body around the face, shoulders, neck and back. Most headaches are considered to fall under the category of tension headaches. However, the entire concept of headaches is still quite a mystery even though most of us have suffered from them at one time or another.

Many researchers believe that both tension headaches and migraines are caused by the amount of serotonin that is produced. Studies show that anti-depressants and various other types of drugs can help change the amount of serotonin that is able to interact with the cells of the nerves.