Inflammation of the nasal mucosa is a condition where the nasal mucous membrane becomes swollen, inflamed, and red. Common symptoms include nasal congestion, clear nasal discharge, nasal itching, sore throat, discomfort, and coughing. If left untreated, this condition can progress to more serious complications, such as sinusitis.

The human body always produces mucus in the throat and phlegm formation is also a normal condition of the body to react to infection. This is a common case in most people and is usually not too dangerous. But in some cases, sore throat with phlegm can be a sign of many diseases.