The nasal secretions that come out is a filtrate and not actual proteins
that are important in maintaining weight.
So there is no need to worry that you will lose weight if you have rhinitis
However, you lose weight in untreated rhinitis and rhinosinusitis through a round-about way in not having good night's sleep, fatigue
in the morning and unable to concentrate through the day.
If the rhinitis is bad, I would suggest getting allergy
testing done to exclude the triggers and treat with flixonase nasal spray
2 sprays per nostril
twice daily for 3 months at the first instance.