It is not uncommon for a cough caused by a virus and/or an exposure to irritants to last for several weeks. Sinusitis is a
commonCommon cold cause of chronic cough. Sinusitis is an inflammation, or swelling, of the mucous membranes that line the sinus cavities. This can block sinus drainage and cause increased mucus production. Symptoms can include a headache or pressure in the area of the sinuses, a stuffy nose, achy teeth, postnasal drip, cough, sore throat, laryngitis, constant low fever, and thick, yellow to green nasal drainage. The most common cause of sinusitis is an infection, especially when the mucus is green. Sinus infections can be difficult to treat since they respond slowly. When a bacterial infection is the cause you may need to take an antibiotic for at least 3 weeks. However, inflammation of the sinuses could also be due to an allergy or ongoing exposure to an irritant, such as pollution or smoke. An important test to make the diagnosis of sinusitis is a sinus CT scan. A sinus x-ray is not quite as good, but it’s better than nothing. Treating with courses of antibiotics without a diagnosis sometimes is frustrating and does not lead to eradication of the problem An ENT would be the type of specialist to identify if blocked sinuses are causing your symptoms to continue and the best treatment. Please read our Sinusitis MedFact at http://www.nationaljewish.org/medfacts/sinus.html for further information.
Best of luck!
Starion
Hope that helps.