Red potion contains mercury components, in the encounter with iodophor can be a chemical reaction, the formation of toxic mercury diiodide, can cause severe irritation to the patient’s wound, and may even lead to poisoning, although the red potion was used for 6 hours, but still can react with iodophor, so it is something. The main ingredient of red potion is red bromide mercury, while the main ingredient of povidone iodine is simple iodine and polyvinylpyrrolidone. Although the red potion has been used for 6 hours, the red bromide mercury still exists in the wound, and when povidone iodine is applied, it will still undergo a chemical reaction and form mercury diiodide. The formation of mercury diiodide can cause severe irritation to the damaged skin and mucous membranes, resulting in severe pain and even the formation of ulcers. If the formation of highly toxic components into the patient’s body, can also lead to severe gingivitis, heart failure and other lesions, is more serious. It is recommended that before using iodophor, patients use saline and so on to clean the traumatic area, thoroughly remove the red potion components, and then apply iodophor; specific cases are recommended to be operated by a professional physician.