Millions of people are affected by headaches daily. Any type of headache, whether it is caused by stress, migraines, or even dental problems, can affect your quality of life and make it very difficult to get through the day. The effectiveness of conventional medicines eventually fades, and they only cover up symptoms anyway. Over the counter pain relievers can cause a tolerance to build up in your body after a while so that they no longer relieve your headaches as well as they once did.