The causes of sore throat with yellow phlegm are acute tonsillitis, acute pharyngitis and so on. 1. Acute tonsillitis: viral or bacterial infection caused by inflammation of the tonsils, the patient can have a sore throat, difficulty swallowing, secondary sinusitis, pharyngitis, tracheitis and other diseases can spit yellow sputum. It is recommended that patients use antibiotics such as cephalosporins, available compound borax solution, vinpocetine water or 1:5000 furacilin liquid gargle. 2. Acute pharyngolaryngitis: when the body’s local or systemic immunity is reduced, pathogenic microorganisms invade the body, causing acute inflammation of the throat, common clinical symptoms such as pharyngeal dryness, pain, hoarseness, spitting yellow sputum. Patients are advised to gargle with warm salt water, take antibacterial drugs such as macrolides or quinolones for anti-infective treatment, and generally do not use antiviral drugs. Patients with yellow sputum in a sore throat need to go to the hospital in time for a clear diagnosis after systematic examination.