The difference between acute pharyngitis and chronic pharyngitis mainly lies in the following aspects: The first is the onset time. Acute pharyngitis generally refers to a sudden inflammatory reaction of the throat, usually lasting for a short duration, about a week, and generally does not exceed a week. Conversely, chronic pharyngitis lasts longer, possibly recurring with repeated throat pain and a foreign body sensation, but the symptoms are generally not very severe, lasting about three months or more, primarily characterized by repeated occurrences. The second aspect is the symptoms, which differ in the mildness of throat pain. Chronic pharyngitis generally involves mild throat pain, and there may also be a sensation of a foreign body in the throat. Acute pharyngitis, on the other hand, is mainly characterized by acute throat pain, with relatively short duration but severe symptoms. Third, it can be determined through a routine blood test. Acute pharyngitis often involves acute bacterial or viral infections, possibly with elevated white blood cells. Chronic pharyngitis generally results from non-bacterial, non-viral infections, with blood tests usually being normal. These aspects together can generally provide a basic diagnosis.