When the mucus membranes within the sinuses become infected and inflamed, we call this condition sinusitis or rhinosinusitis. the sinuses drain into nasal passages, so a sinus infection can also spread to them. the result is swelling and pain throughout the face, and difficulty breathing. what are the symptoms of sinusitis?. They are caused by mucosal inflammation, which inhibits mucociliary function of the nose and paranasal sinuses. objective/s. this article provides an overview of . 6 Symptoms Of A Sinus Infection And When To See A Doctor Rhinosinusitis, or just sinusitis, occurs when your nasal cavities become swollen, infected, or inflamed. find out all sinus infection symptoms, the different between acute and chronic sinusitis. Acute rhinosinusitis (ars) is defined as symptomatic inflammation of the nasal cavity and paranasal sinuses (figure 1) lasting less than four weeks. the term "rhinosinusitis" is preferred to "sinusitis" since inflammation of the sin...