Allergic sinusitis Allergic sinusitis is caused by a reaction towards dust, mold, pollen, or another substance in the environment. Some people develop an allergic reaction to harmless fungi that can grow in their sinuses if they have fleshy growths (polyps) or other obstructions in the nose. It causes frequent headache in front portion and periocular pain. In many of the cases symptoms such as fever, illness or post nasal drip does not occur. In these cases patients may complaint other aller

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