MEDLINEplus: Sinusitis The National Library of Medicine (National Institutes of Health) public database search engine. Extensive citations and information.
SinuCare, Inc. A large amount of information and articles regarding sinusitis and treatment. Features email newsletter and discussion forums.
Sinus Info Center Offers information on anatomy, causes, symptoms and treatments.
WebMD - Sinusitis An overview of the causes, risk factors, and symptoms.
The Role of OTC Decongestants in the Treatment of Rhinosinusitis Professional overview discusses the physiology of nasal congestion and how decongestant medications work. Recommends using decongestants to treat sinus symptoms and reduce antibiotic use. [Requires free registration.]
The Nose and Sinus Center Offers information about several nose and sinus problems, including anatomy.