It could have started as allergic rhinitis and got aggravated by use of nasal sprays,,rhinitis medicamentosa (inflammation
of the
nasal mucous membrane due to application
of topical
nasal sprays, ointments and drops). The symptoms could also be due to vasomotor rhinitis (in response to dry air) or viral infection.
Deviated nasal septum, nasal polyps and tumors can also cause persistent nasal congestion.