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 SPONSORED: So many prizes! Click through and see our fantastic competitions. 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 African immigrants face ostracism in the US as panic takes hold Medical The worst rugby injuries caught on camera Lifestyle British woman dies while having butt implants removed Medical Two-way relationship between depression and activity News Australian doctors transplant 'dead' hearts Medical A troubled marriage may lead to weight gain From our sponsors Exam stress – a challenge for the whole family Eduloan offers affordable education finance Vote for 2014 Hill's Pet Slimmer of the Year Live healthier Strenghten your immunity » Keep your immunity strong Immune system boosters Boost your family's immunity 5 immune boosters in your kitchen You don’t need a handful of vitamins and supplements to keep your body healthy, check out these five immune boosting foods you probably already have in your kitchen. Depression » Depression Depression and ageing Teen depression Depression: do you know the signs? One of the key roles you can play in the health of someone who is depressed or suffers from anxiety is to make sure they get the help they need. Here's what you need to know.