allergies? chronic sinusitis? unfortunately it would not be possible to diagnose or treat you over the internet since we do not know anything about you your medical history nor have a way of examining you first-hand. i would suggest that you see a medical provider so you can be properly assessed and treated based on a patient-specific diagnosis. not a blind guess.
i am suffering from post nasal discharge and sore throat from past few months. what could be the reason and treatment?