Jan. 14, 2013 -- Just how long should that pesky cough last? The answer, according to most doctors, is close to 18 days. Yet many people with a cough get antsy after about five to nine days, a new study shows. âCoughs last for longer than we think they do,â says researcher Mark H. Ebell, MD, a family doctor at the University of Georgia in Athens.
Inflammation of the sinus cavity that lasts for more than three months is chronic sinusitis. Although bacteria often colonize obstructed sinuses, bacterial infections are not the only cause of chronic sinusitis. Anatomy, allergies, polyps, immune deficiencies, and dental diseases may also cause chronic sinus problems.
Inflammation of the Nasal Tissue. An inflammation of the nasal tissue may initially be caused by an infection. A persistent inflammation however can result in a benign growth in the nasal airway and sinuses referred to as a nasal polyp.