Did you know that one of the primary side effects of many prevalent headache medications is, well…more headaches! Yes . . . You read that correctly! Rebound headaches are often caused by the same medications you use to find relief. Even taking medications for more than just a few days may trigger overuse, or rebound, headaches. If you find yourself reaching for over-the-counter pain medications more than once a week, you may be putting yourself at risk for rebound headaches.