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What are the complications of a sinus headache?
Complications of a sinus infection (sinusitis) are rare; however, if left untreated a sinus infection may erode through the bony walls of the sinus and infect adjacent structures in the face. Two potential areas for spread of the infection include:
The orbit (eye socket), causing pain, swelling, and redness of the eyelid and skin surrounding the orbit. There can also be pain with any eye motion.
Decreased vision may develop.
The brain, causing symptoms of meningitis or encephalitis.
The blood vessels that run near the sinuses can develop inflammation and blood
may clot (thrombus). Cavernous sinus thrombosis describes the inflammation and clotting of the cavernous sinus, a collection of small veins located near the sphenoid sinus, that can potentially become infected and form blood clots.