<span style = 'background-color: #dae8f4'>sinus</span>itis
is an inflammation of the mucous membranes that line the sinus
cavities. Inflammation of the sinus
es could be due to an allergy, an infection
, or ongoing exposure to an irritant, such as pollution or smoke. Symptoms can include a headache or pressure in the area of the sinus
es, a stuffy nose, achy teeth, an odor coming from the nose, postnasal drip, cough, sore throat, laryngitis
, lightheadedness, constant low fever, and
thick, yellow to green nasal drainage.