Home > Medical > Sinusitis > About sinusitis Updated 16 July 2014 8 quick sinusitis facts Is sinusitis making your life miserable? Get some quick facts right here. 0 iStock Quiz Are you eating to control headaches? » Ask CyberDoc » Quiz Am I eating too much sugar? » Subscribe Newsletters » Medicines that changed history Common allergy myths Sinusitis can make your life truly miserable. Here's what you need to know about this condition.Anything interfering with airflow into and drainage of mucus out of the sinuses can cause sinusitis. The sinus openings may be obstructed by anything, causing swelling of tissue lining the ostia and adjacent nasal passage, such as colds, allergies and tissue irritants (such as over-the-counter nasal sprays, cigarette smoke and recreational substances snorted through the nose). Allergies may complicate sinusitis. Drainage of mucus can be impaired by thickening of secretions, decrease in mucus hydration (water content) because of disease, drying medications (antihistamines), and lack of air humidity. Irritants, especially smoke, may damage cilia, and prevent them from assisting with mucus drainage. Stagnated mucus provides an ideal environment for bacteria and in some cases (such as AIDS) fungus to grow. Other irritants include car exhaust, petrol and paint fumes, perfume, insect spray and household chemicals. Sinuses can become obstructed by tumours or growths. Nasal polyps (growths arising from mucous surfaces), probably caused by nasal inflammation, can block the ostia. Occasionally, immune problems cause sinus infections. If you have persistent sinus infections, have your immune system evaluated by an allergist/immunologist, especially before surgery is done. You may need allergy tests, and tests to ensure you can form antibodies to common bacteria normally. Sinusitis can be due to AIDS, although only an extremely small percentage of people with sinusitis have AIDS. Health24 Sinusitis A - Z More in Medical What is making you sneeze? More: SinusitisAbout sinusitis advertisement Get a quote Momentum - save up to 35% on healthcare advertisement Read Health24’s Comments Policy Comment on this story 0 comments Add your comment Thank you, your comment has been submitted. Logout Comment 0 characters remaining Share on Facebook Logout Comment 0 characters remaining Share on Facebook Loading comments... Other news News Doctor leading Ebola fight contracts disease himself Medical SA to start HIV+ patients on antiretrovirals sooner Medical Gut bacteria suffer when hit with infection Medical High-salt diets can cause heart woes in diabetics News SA youth want drinking age lowered Medical Drinking alcohol lessens your chance of developing arthritis From our sponsors A number of good reasons why saving the tooth is a better option Breakfast like a King Alzheimer’s disease – incurable but preventable Cancer is a word that strikes fear into the hearts of many. Live healthier Yoga » Exercise time? Yoga mats matter Yoga and sleep What yoga can do for you Yoga is a stress-buster, but it also helps with anxiety, depression, insomnia, back pain and other ills. Allergy alert » Allergy myths Cold or allergy? Children and allergies Allergy facts vs. fiction Some of the greatest allergy myths and misconceptions can actually be damaging to your health.