The differentiation between acute pharyngitis and chronic pharyngitis mainly involves the following aspects: First, the onset duration. Generally, acute pharyngitis has a short onset, often sudden, and typically lasts about a week; whereas chronic pharyngitis tends to have a longer duration of illness, possibly involving repeated episodes, usually lasting from one to three months or more. Second, in terms of clinical symptoms, acute pharyngitis usually presents sudden onset of throat pain, which can be relatively severe; chronic pharyngitis may involve pain, but it is generally milder and recurrent, fluctuating, with some patients experiencing a sensation of a foreign body or itchiness in the throat. Third, it can be diagnosed through laryngoscopic examination.