The causes of sore throat are local factors and systemic factors, as follows: 1, local factors: acute pharyngitis caused by repeated episodes, various diseases and chronic inflammation of the respiratory tract, long-term open-mouth breathing and inflammatory secretions repeatedly stimulate the pharynx, or affected by chronic tonsillitis, periodontitis, excessive smoking and alcohol, dust, spicy food, harmful gases or allergens stimulation, etc. 2, systemic factors: such as anemia, dyspepsia, throat reflux, chronic inflammation of the lower respiratory tract, cardiovascular disease, endocrine dysfunction, vitamin deficiency and low immune function, etc., can cause this disease. Patients with sore throat should pay attention not to smoke, drink alcohol, do not eat spicy and stimulating food, drink more water, eat more fresh fruits and vegetables, and exercise properly to enhance physical fitness, etc.