How does TCM know pharyngitis?

Traditional Chinese medicine refers to throat diseases with sore throat, dysphagia, foreign body blockage, itchy throat and dry fever as the main symptoms, which corresponds to pharyngitis in western medicine. According to the different etiology and pathogenesis, it can be divided into "wind-heat laryngitis" and "deficiency-fire laryngitis", which is equivalent to acute pharyngitis and chronic pharyngitis in western medicine. Traditional Chinese medicine has a complete theoretical system for understanding the etiology of pharyngitis, and there are also many effective prescriptions handed down from generation to generation in syndrome differentiation and treatment. As far as Neijing, there are many discussions on the etiology and pathogenesis of laryngitis. For example, "Su Wenzhizhen's Great Essay" said: "When the spring is too cloudy, the grass blooms early, and the humidity wins, the mood will faint, the yellow will turn black, and the people will get sick ... laryngitis will swell up." It is pointed out that the imbalance of lung and sieve, yin and yang, or the influence of climate change and the invasion of exogenous pathogens cause stagnation of qi and blood, stagnation of qi and internal heat, and the feeling of wind-heat pathogens, and internal and external heat pathogens can be trapped in the throat and cause diseases. These expositions in Neijing became the theoretical basis for later doctors to treat laryngeal obstruction. In the treatment of Sui Dynasty, the methods of keeping in good health and dredging were put forward emphatically. In the Yuan and Ming Dynasties, it was recognized that the disease was related to climate and seasonal changes, and the relationship between laryngeal obstruction and pathological changes of viscera and meridians was clarified. The rapid development of laryngology in Qing dynasty deepened the understanding of laryngeal obstruction, and put forward many principles and methods to treat laryngeal obstruction, which greatly promoted the treatment of laryngeal obstruction.