Can i tell me how i can clear allergy symptoms overnight?

Treat day: Typically if allergy syptoms like congestion and postnasal drainage/cough are bad at night, you have to start with your day treatment. The best way I have found for my patients is by using a sinus rinse which should clear the mucosa of these particles and also rinse off the inflammatory mediators without contributing to dryness. If this is not helpful, medication or immunotherapy for treatmt.