Iodine disinfects and kills bacteria and is used to disinfect the skin and treat inflammatory symptoms, but it is not used in all cases. Iodine is made from potassium iodide and iodine, dissolved in alcohol. It is able to denature pathogen proteins, thus playing a powerful role in killing fungi, bacteria, viruses and other pathogens. Clinically, iodine is used to treat bacterial, viral and fungal skin diseases. Iodine can also be used externally to treat periodontitis, infectious lipitis and so on. However, it should be noted that iodine needs to be used correctly under the guidance of a doctor, if you are allergic to iodine can not be used, and can not be used on the skin ulcers. Iodine should be deiodized with alcohol after being used to disinfect the skin.