Iodine should not be used on wounds because it can cause severe pain. This is because iodine is mainly composed of iodine and alcohol, and iodine has a disinfecting effect on wounds and does not cause pain. Alcohol also has a certain denaturing effect on the wound tissue, which can easily denature the wound tissue and cause some necrosis and infection, so alcohol is not suitable for use on wounds. It is recommended that when wiping the wound, you can use iodophor to wipe it instead of using iodine to wipe it. The above content is for reference only. Please refer to the doctor’s instructions for specific medication and treatment.