Complete treatment for pharyngitis requires time, while patients often stop medication once symptoms improve, causing the pharyngitis to become chronic. If not diagnosed and treated in time, the disease can lead to serious complications, including nasopharyngeal cancer.

Tonsillitis occurs when the number of bacteria and viruses invading a child's body exceeds the permissible level. When the tonsils become swollen and repeatedly inflamed, the body's ability to fight off bacteria and viruses weakens. These tonsil infections trigger episodes of inflammation in the throat area, also known as pharyngotonsillitis.