9 out of 10 people usually have a deviated nasal septum which is normal. But as a side effect if you suffer from frequent allergies your nose gets blocked due to congestion and the deviated septum will aggravate the symptoms.
Next Steps
It should stabilise with normal nasal decongestants. But if the problem persists, You need to consult an ENT specialist and get your nose examined. If required you will be needed to undergo Septal correction procedure.
Health Tips
Practise pranayama regularly to reduce frequent allergy episodes