Burning pain in the throat is a symptom of viral pharyngitis. The lesion of burning pain in the pharynx is an edema and swelling of the epithelial cells, causing the epidermal layer of spiny cells to bulge and form a blister containing a large number of multinucleated leukocytes and serum, with eosinophilic envelopes in the nucleus, which quickly ruptures and forms a shallow ulcer covered with inflammatory cells, red blood cells or necrotic tissue. What are the causes of burning pain in the pharynx: Bacterial infection Bacteria are divided into bacilli, cocci, Gram-staining positive and negative bacteria, and bacterial infections can occur in all organs and systems of the body. Infectious bacteria are divided into pathogenic and conditionally pathogenic bacteria, which invade the blood circulation to grow and multiply, producing toxins and other metabolites caused by acute systemic infection, clinically characterized by chills, high fever, rash, arthralgia and hepatosplenomegaly, some of which may have infectious shock and migratory foci. Acute systemic infection caused by the invasion of pathogenic microorganisms into the bloodstream from wounds or infected foci in the body. Clinically, some patients may also present with irritability, cold and cyanosis of the extremities, fine and rapid pulse, increased respiration, and decreased blood pressure. In particular, sepsis or septicemia may develop in the elderly, children, those with chronic diseases or immunocompromised, and those with untimely treatment and complications. Chronic lingual tonsilitis (chronic lingual tonsilitis) or hypertrophy of the lingual tonsils, mostly due to recurrent episodes of acute lingual tonsillitis to chronic, mostly related to chronic inflammation of the upper respiratory tract, excessive smoking and alcohol consumption, stimulation of irritating foods and harmful gases. It often coexists with chronic tonsillitis, and compensatory hypertrophy of the lingual tonsils may also occur after tonsillectomy. The disease occurs mostly in adults and is rare in children. Acute cavernous sinus embolic phlebitis Acute cavernous sinus embolic phlebitis is a severe septic inflammation of the cavernous sinus. Untreated, the mortality rate is extremely high. Caused by a purulent bacterial infection, the most common causative organism is Staphylococcus aureus. This condition occurs in the eye and commonly takes two forms, a purulent inflammation in which the inflammatory foci of the surrounding structures migrate through the blood vessels to the orbit, causing acute purulent embolic phlebitis.