The pain can start for any number of reasons. You haven't looked up from the computer screen in hours, the neighbor is playing the drums again, the jackhammer outside your window just won't quit.
While headaches can occur for many reasons, including stress, muscle tension, sinus infections, PMS or lack of sleep, many chronic headache and migraine sufferers can pinpoint certain things they eat or drink that set off the pounding.
Key to getting the best treatment is understanding your pain; tracking your symptoms and potential triggers can help you determine what type of headache you have and how to tame the pain.
For some ideas of where to look, click through these foods that either trigger or tame headaches. Then tell us in the comments what causes your headaches and what you do for relief.
For more on chronic pain, click here.