Non-allergic rhinitis is a condition that closely resembles an allergy, bit is not. It is an inflammation of the inner part of the nose. There are 4 types of non-allergic rhinitis. They are: Infectious rhinitis, vasomotor rhinitis, atrophic rhinitis and rhinitis medicamentosa, each having their own causes. The disease develops mostly in adulthood, is more prevalent in males than females, and fairly common in India, with around 2 million patients per year.