What is the difference between sinusitis and rhinitis?
Rhinitis refers to inflammation of the mucus membranes of the nose, whereas sinusitis refers to inflammation in the sinuses. Allergic rhinitis is inflammation in the nose that is caused by allergens, and it may be seasonal or perennial (year-round). Non-allergic rhinitis may be caused by structural problems with the nose, changes in hormones, or overuse of nasal sprays. Infectious rhinitis is caused by bacteria, fungi, or viruses, and this accounts for most cases. Poorly controlled rhinitis can lead to sinusitis.
