The main difference between tonsillitis and pharyngitis is the different parts of the body involved in the inflammation, which is mainly distinguished by symptoms and examinations. 1. Tonsillitis is an infectious disease caused by the tonsil tissue in the pharynx. It mainly produces sore throat, swallowing pain, and in severe cases, dysphagia. Examination will find that the tonsil tissue is congested, red and swollen, and in severe cases there will be pus. 2. Pharyngitis is an infectious disease of the mucous membrane of the throat. It mainly produces symptoms such as sore throat, itchiness, foreign body sensation, irritating cough, phlegm, etc. When examined, the mucous membrane of the throat is diffusely congested, and the lymphoid follicles are hyperplastic and red and swollen. Whether it is tonsillitis or pharyngitis, it is necessary to consult an otolaryngologist to clarify the diagnosis and follow the doctor’s instructions for treatment.