There is no fastest way to heal rotting corners of the mouth, rotting corners of the mouth, also known as stomatitis, may be related to bacterial infection or fungal infection, usually medication is carried out, and the type of infection is different, the medication is also different. 1. For stomatitis caused by bacterial infection, erythromycin ointment, gentamycin ophthalmic ointment and other medications can be applied, and in severe cases, oral medication can also be used, such as ciprofloxacin, levofloxacin and so on. 2. The presence of fungal infections can also cause keratitis, after diagnosis, you can use antifungal drugs for treatment, such as terbinafine ointment, with the use of sodium bicarbonate solution gargle, when the infection is more serious, you can use oral medication, such as itraconazole. During the treatment period, you should listen to the doctor’s guidance, safe and reasonable use of drugs for treatment, do not use drugs indiscriminately.