Without nasya or jal neti, it's almost impossible to cure rhinitis or sinusitis...along with this some medicines are also required.
If it's remain untreated then definitely eye itching, weak eye sight, throat infection...then bronchitis, asthma etc will be next stage
Next Steps
consult here for proper treatment
Health Tips
sutra neti, jal neti and anulom vilom pranayam are best