Purple Potion and Iodophor can both be used to disinfect skin and mucous membranes. In contrast, Iodophor has a broader action and a wider antimicrobial spectrum, and it is recommended to use Iodophor for abrasions. Violet solution is a triphenylmethane dye disinfectant, which can kill staphylococcus, Pseudomonas aeruginosa, diphtheria, ringworm, etc., but it is almost ineffective against acidophilus and Gram-negative bacteria. In contrast, povidone-iodine has a broader effect and a wider antibacterial spectrum. Povidone-iodine has a broad-spectrum bactericidal effect, which can kill fungi, protozoa, bacterial propagules, some viruses and so on. It can be used for the disinfection of skin and mucous membranes, as well as for the treatment of burns, and can also be used for the treatment of trichomonas vaginitis, mycosis fungoides, and so on. Currently, the use of iodophor is much higher in the clinic, and it is recommended to use iodophor to disinfect after abrasions.