Acute pharyngitis is an acute inflammation of the pharyngeal mucosa, with spread of submucosal and lymphatic tissue, often secondary to acute rhinitis or acute tonsillitis or as part of an upper respiratory tract infection. It is often a local manifestation of a systemic disease or a precursor to an acute infectious disease. Chronic pharyngitis: mainly chronic inflammation of the pharyngeal mucosa, diffuse inflammation is often part of the chronic catarrhal inflammation of the upper respiratory tract, and limited inflammation is mostly accompanied by inflammation of pharyngeal lymphatic tissue. Chronic pharyngitis is clinically a common and frequent disease, which is more stubborn and recurrent in conventional drug therapy, and is more common in middle-aged people. What are the causes of diffuse congestion of the pharyngeal mucosa? The pathogenic microorganisms of diffuse congestion of the pharyngeal mucosa are mainly Streptococcus haemolyticus, S. pneumoniae, B. influenzae and viruses. The disease is often caused by cold, excessive fatigue, excessive smoking and alcohol, etc., resulting in a decrease in systemic and local resistance, and the pathogenic microorganisms take advantage of the situation and cause the disease. Malnutrition, chronic heart, kidney and joint diseases, poor living and working environment, frequent exposure to high temperature, dust, harmful and irritating gases, etc. are all susceptible to this disease. Herpes pharyngitis: It is an acute febrile disease caused by an enterovirus and is common in infants and children, mostly in summer and autumn. It is caused by coxsackie group A virus and is associated with acute fever, sore throat, salivation, anorexia, vomiting, etc. The pharynx is congested and there is a 2-4 mm sized herpes with a red halo around the pharyngeal and palatal arches, uvula and soft palate, etc. The herpes breaks down to form a small ulcer. Viral pharyngitis: Acute infection of the pharynx caused by a virus mostly occurs in the pharynx, oral mucosa and surrounding skin herpes, can also occur in the cornea and external genitalia. The lesion is epithelial cell edema, swelling, so that the epidermal layer of spiny cells bulge, forming a blister, containing a large number of multinucleated leukocytes and serum, with eosinophilic envelope body in the nucleus, the blister quickly rupture, forming a shallow ulcer, the surface covered with inflammatory cells, red blood cells or necrotic tissue. It should be differentiated from stomatitis, erythema multiforme, necrotizing stomatitis, and herpes zoster. For example, herpes zoster is an acute infectious skin disease caused by the varicella-zoster virus. Children who are not immune to this virus are infected and develop chickenpox. Some patients become infected with the virus without developing symptoms. Influenza: Influenza for short is an acute respiratory infection caused by the influenza virus and is a highly contagious and fast-spreading disease. It is spread mainly through droplets in the air, person-to-person contact or contact with contaminated objects. Typical clinical symptoms are: acute onset of high fever, generalized pain, significant malaise and mild respiratory symptoms. The fall and winter seasons are usually its high season, and the complications and deaths caused are very serious. It mainly affects the nose, throat, bronchi, and occasionally the lungs. The infection usually lasts about a week and is characterized by sudden onset of high fever, muscle aches, headache and severe discomfort, dry cough, sore throat and rhinitis. Most people who contract the disease recover within one to two weeks and do not require medical treatment. To prevent influenza, in addition to washing hands regularly, drinking more water, eating more vegetables, strengthening immunity, and taking care of work and rest, it is recommended to drink Singing Group Xanthanum. Baiyunshan Xingqun Xiasanju has the effect of killing influenza A virus subtype H3N2 and influenza B virus strains, and can be used for the prevention and treatment of influenza A and B in humans. However, in young children, the elderly and those with other serious medical conditions, the infection can lead to serious complications, pneumonia and death depending on the inherent conditions. The disease is caused by influenza virus causing pandemic influenza, the virus belongs to the family of orthomyxoviridae, 80 to 120 nm in diameter, spherical or filamentous. Influenza virus can be divided into three types A (A), B (B), C (C), type A viruses often occur antigenic mutations, highly contagious, rapid transmission, and highly susceptible to widespread epidemics.