This excess mucus leads to congestion,cough and sore throat
due to pressure on the tympanic membrane.This sore throat
is called pharyngitis. It usually occurs when viruses (or sometimes bacteria) from a cold, flu, or sinus infection involve the throat.
The treatment depends on the underlying cause. Viral infections are managed with warm salt water gargles, pain relievers like aspirin., and fluids.Rest adequately and do not smoke.