Applying too much iodized glycerin will generally not burn the gums, but those who are allergic to iodized glycerin may experience redness, swelling and burning of the gums. 1. Iodine glycerin is a glycerin solution of iodine, a disinfectant and antiseptic, and its mechanism of action is to denature and kill bacterial proteins, and it has a killing effect on bacteria, fungi and viruses. Irritation is relatively small, which contains iodine ions can play a certain antibacterial, anti-inflammatory, astringent effect, coated with more generally will not burn the gums, commonly used in oral mucosal ulcers, gingivitis, periodontitis and peri-coronitis treatment. 2. The main ingredient of iodized glycerin is iodine, and patients who are allergic to iodine may experience burning sensation, redness, swelling and pain at the site of the medicine. People who are allergic to this kind of medicine and newborn babies should use it with caution, and it should be used under the guidance of professional physicians. Iodized glycerin is a kind of topical medication for oral diseases, you should consult a professional physician before using this drug.