What is the difference between sinusitis and rhinitis?

Inflame vs infect. Rhinitis is inflammation of the nose while sinusitis is inflammation of the sinuses. Both can be caused by either bacteria or viruses. Both can be caused by allergy or dysfunction of the nose or sinuses cause by chemicals or pollution. Both present differently depending on their cause. Infectious sinusitis can lead to inflammatory rhinitis. Infectious rhinitis can lead to inflammatory sinusitis.
Infection. Sinusitis is a bacterial infection of the sinuses. Rhinitis is inflammation of the nasal passages. The two usually but not always coexist.

Related Questions

What is the difference between chronic sinusitis and rhinitis?

Nose vs sinus. Chronic sinusitis in an inflammation of the sinuses usually from bacteria or viruses, that has persisted for about 2 months. On the contrary, rhinitis (congestion, runny nose) is inflammation of the nasal passage. Because they often go hand in hand, we like to use the term chronic rinosinusitis (crs). Read more...
Nose vs. sinuses. Rhinitis is inflammation of the nasal passages, while sinusitis is inflammation of the sinuses around the nasal passages ... Read more...