The swelling and sore throat of the flesh behind the big teeth may be caused by pericoronal abscess of the wisdom teeth, which is a condition caused by the blind pocket between the wisdom teeth and the gums during the eruption process. Moreover, the blind pocket and the tooth are then prone to food impaction, and if they are not cleaned for a long time, they are prone to septic swelling, so the flesh behind the big tooth will appear swollen and painful. In addition, septic infection and dysbiosis in the mouth can lead to throat infection and sore throat. It is recommended to take appropriate oral anti-inflammatory drugs, such as amoxicillin, erythromycin or azithromycin with the use of metronidazole tablets, tinidazole tablets, which can fight against anaerobic bacterial infection and have the effect of reducing swelling and relieving pain, and pain relief drugs can be used for heavier pain, such as acetaminophen or ibuprofen.