Quite a few people have sinus problems, but I didnt think I would experience it myself. In November 2008, I suffered daily headache for nearly two weeks. In the past, I would have headache for a day or two, but often no more than three days in a roll. This time, I felt I needed some medical help, since I was going to take a long trip (from Hawaii to South America) and I didnt want to fall ill in a foreign country. My doctor at Kaiser examined me, and found nothing apparently wrong. So, she said: I suspect that your headache is caused by sinus infection. Sinus infection? But, I have no running nose She was confident, and didnt even order further tests. She gave me antibiotics for 10 days (amoxicillin), and also asked me to use a nasal spray (Fluticasone Propionate) daily. In my own experience, there are two illnesses that doctors cannot help: headache and rash. However, to my surprise I felt my head was enlightened the second day after having started the antibiotics! I was so happy and had a wonderful time in Argentina. I am not a person who likes medicines; I dont even like vitamins or calcium pills! So, I decided to stop the nightly nasal spray. My experiment failed miserably. About a week later, my head became congested and my headache returned. I called my doctor and asked if I needed to get another round of antibiotics. She said: Start your nasal spray first. If your condition is not improved in a few days, we will use antibiotics then. I was lucky: the headache went away. I continue to live a quasi-normal life (not as normal as I would prefer, because I have to use the spray religiously). Note that the nasal spray does not cure infection, but it prevents sinus infection from happening by opening one's airways (correct me if I am wrong). I hope this real-life experience can help someone who suffers similar symptoms. However, I am not a medical doctor, and my suggestion is you go visit a professional doctor and ask if you could try these medications I mentioned above.