Causes
By Mayo Clinic staffSinus headaches accompany sinusitis, a condition in which the membranes lining your sinuses become swollen and inflamed. Sinusitis can be caused by colds, bacterial or fungal infections, an impaired immune system, or structural problems in the nasal cavity. The resulting pressure changes in the sinuses can trigger headaches.
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- Swanson JW (expert opinion). Mayo Clinic, Rochester, Minn. Feb. 14, 2012.


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