LYCOS RETRIEVER 
Rhinitis: Pollens
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(J30.1-J30.4) Allergic rhinitis is one of the most common allergies. It can be seasonal as some who are affected suffer during seasons of extreme pollen production. It can be caused by outdoor agents such as pollen (pollen allergy is called hay fever).
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Other medical research has supported the close relationship between allergic rhinitis and sinusitis. In a retrospective study on sinus abnormalities in 1,120 patients (from two to 87 years of age), thickening of the sinus mucosa was more commonly found in sinusitis patients during July, August, September, and December, months in which pollen, mold, and viral epidemics are prominent. A review of patients (four to 83 years of age) who had surgery to treat their chronic sinus conditions revealed that those with seasonal allergy and nasal polyps are more likely to experience a recurrence of their sinusitis.
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The common cold and hay fever are both types of the very common condition caused rhinitis. Viral rhinitis is one form of rhinitis that everyone has experienced, it is another name for the common cold. However, patients suffering from allergic rhinitis, perhaps caused by grass or tree pollens (hay fever), dust mites, pets, feathers or fungal spores often claim that they are suffering from frequent colds, because they have never realised that an allergy might be at the heart of the problem.
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