[header] How to stop sinus headaches [title] Take sudafed. [step] If you cannot see your doctor immediately, you can take sudafed pe sinus headache, which comes in 325 mg/5 mg caplets. These can be bought over-the counter. 
[substeps] They contain acetaminophen which helps to relieve pain. They also contain phenylephrine hydrochloride which relieves congestion in the nose by shrinking the blood vessels.