What is chronic pharyngitis caused by? i do not smoke or misuse my voice. i have a cough and post nasal drip along with serious fatigue.

Allergies : Allergies cause rhinitis (runny nose) that causes post nasal drip. This can cause irritation of your throat (pharyngitis). Over-the-counter allergy medicine may help relieve it. You can try loraditine (claritin) or other previous prescription anti-allergy meds cetrizine (zyrtec). Check with your doctor if this does not make it better in a few days, you have any medical conditions or are pregnant.