Home > Medical > Sinusitis > Overview Updated 08 July 2013 8 quick sinusitis facts Is sinusitis making your life miserable? Get some quick facts right here. 0 Pin It 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 How is sinusitis treated? More: SinusitisOverview advertisement Get a quote Bestmed - offering you quality healthcare and freedom of choice Momentum - save up to 35% on healthcare Medihelp - quality, affordable medical scheme cover 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 Lifestyle Snail fever to decline due to climate change Mental health Laughter can be dangerous to some people Mental health Treating autism with intestinal worms Medical Eczema sufferers may react to skin lotions Medical Irregular heartbeat linked to depression Lifestyle Energy drinks and alcohol a bad combination From our sponsors Sense of community key to a meaningful and fulfilling retirement Your retirement - a healthy mindset So many people, why so alone? You can still enjoy the sweet things in life Live healthier 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. Healthy dog » Dog weightloss Dog behaviour Overweight dogs Food not to feed your dog Feeding you dog 'human food' may be detrimental to its health.