Pharyngitis
This is an infection that affects the pharynx, a portion of the throat that starts from the tonsils and ends at the larynx (voice box). Most cases of pharyngitis are typically marked by inflammation of both the tonsils and the pharynx. The inflamed tonsils also show formation of pus that appears as white patches. Pharyngitis can be viral, bacterial or fungal in origin. However, majority of cases are causes by viruses that lead to fever, chills, throat pain and difficulty swallowing.