Laryngitis can cause bad breath. This is because the majority of pharyngitis in clinical practice is caused by patients suffering from chronic tonsillitis. In chronic tonsillitis, the patient will have bacterial retention in the tonsillar crypt, followed by bacterial fermentation and metabolic disorders, resulting in purulent secretions from the tonsillar crypt, and after elimination, there will be pus plugs and pus, which will then cause bad breath. Therefore, when this symptom occurs clinically, the main thing is symptomatic anti-inflammatory treatment, you can give the patient roxithromycin tablets, cefadroxil tablets orally, at the same time, you can carry out rehabilitation new liquid, gargle twice a day, generally the symptoms will be relieved. But if after repeated treatment is still ineffective, bad breath still persists, this situation can be from the clinical under local anesthesia or general anesthesia, the tonsil removal surgery. After the surgery, the bad breath will disappear, and you should eat a light diet, eat more vegetables and fruits, and avoid greasy food.