Red salve and iodophor should not be applied at the same time, because iodine and red mercury together will cause a chemical reaction that leads to the formation of mercury iodide, which is harmful to the human body. Especially when treating wounds, it can lead to mercury deposits on the wound surface, which also affects the healing of the incision and the wound, so the two should be used separately. Red salve is very commonly used for traumatic wounds, especially soft tissue skin abrasions, and has a local astringent effect and can also prevent infection. Iodophor is the most commonly used disinfectant, especially for wounds after venipuncture or surgery, and can be used for changing medication.