After tonsil surgery, the mouth stinks because the mouth is not rinsed after meals, and food residues are stored in the tonsil fossa and fermentation is caused, or it is caused by postoperative infection of the tonsils. Generally need to perform a pharyngeal examination, the surface of the tonsil fossa has a white material dirty thick, consider the tonsil postoperative infection, need to give antibiotic treatment, can be given to cefotaxime sodium intravenous drip, sometimes accompanied by anaerobic infections, the need to add metronidazole intravenous medication, general medication for about 5 days, after the control of inflammation, the surface of the tonsil is clean, the periphery of the no obvious congestion can be. If food residues are retained in the tonsil fossa, more mouth rinsing should be done after meals to reduce residue retention and odor caused by fermentation.