Swollen and sore throat with yellow sputum is caused by inflammation of the throat due to bacterial infection, which is usually called upper respiratory tract infection. For upper respiratory tract infections, the inflammation site will have some congestion and edema, as well as redness, swelling, heat and pain, which are typical manifestations of inflammation, so the throat will feel more swollen and painful. Yellow sputum is caused by the neutrophils in the body gathering in the throat and swallowing foreign bacteria, followed by the lysis of neutrophils and the formation of yellow sputum. At this time, you need to take antibiotics to treat the swelling of the throat and the phenomenon of yellow phlegm. If you are not allergic to penicillin, you can take amoxicillin clavulanic acid potassium for anti-inflammatory purposes, 3 times a day, and the specific dosage should be used according to the weight according to the instructions. For the phenomenon of yellow sputum, if the amount is relatively large, you need to take the lung power cough combination, compound fresh bamboo liquid for treatment.