The difference between violet solution and iodophor is mainly reflected in the following aspects: First, the composition, iodophor is mainly composed of active iodine while the composition of violet solution is mercury, because mercury sterilization, so the violet solution presents a purple feeling, although both have sterilization effect, but for different wounds have different effects, patients can choose the appropriate disinfection according to the injury situation. Second, the scope of application is different, the use of iodine volts is more extensive, almost all wounds are applicable, but the effect is somewhat different. For purple drops, generally used for skin abrasions, such wounds coated with purple drops can help patients wound scab as soon as possible. It should be noted that if the patient has a deep wound, it is not suitable for the use of purple drops because of the possibility of mercury poisoning. It is also important to note that the wound should be treated briefly to ensure cleanliness before using either medication. It is also important to disinfect the wound again after the first dose to prevent infection due to drug failure.