Hi Susie, If you are sure your headache is due to clogged sinuses (it might not be), then allergy medicine might help... if you have nasal allergies. At any rate, it should help reduce nasal and sinus inflammation to some extent. But if the headache actually has some other root cause, then treating for allergies isn't going to do anything. Or if the headache is due to a sinus infection, then antibiotics might be needed, though only a doctor could tell you for sure.
Another gentler treatment you could try is a nasal saline rinse. I tell you all about this "natural" treatment here:
http://www.healthcentral.com/allergy/c/3387/81079/saline-irrigations
To your health,
Kathi
Important:
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.