Red potion is the common name of red mercury, compared with iodophor, or iodophor is better. 1. Red mercury: clinically available 2% solution for disinfection, however, bactericidal, bacteriostatic effect is weak but no irritation, mainly for small areas of skin abrasions, bruises and other wound disinfection treatment. The disinfectant can not be used for a long time, especially not for mucosal wounds, to prevent mercury poisoning. 2. Povidone-iodine: has a broad-spectrum bactericidal effect, can kill bacterial propagules, fungi, protozoa and some viruses. In clinical application, in addition to being used as a disinfectant, such as skin disinfection before surgery, skin disinfection before drug injection, disinfection of wound debridement treatment, it can also be used for the treatment of trichomonas vaginitis, mycosis fungoides, skin mycobacterial infections and so on. Moreover, povidone-iodine can be used for the disinfection treatment of mucous membrane wounds with higher safety. Analyzing from the above, iodophor is better than red potion. However, for the wound trauma, it is still recommended to seek medical treatment as early as possible, and carry out wound disinfection treatment and medication under the guidance of doctors to ensure the smooth recovery of the wound. In addition, these two substances should not be used at the same time to prevent mercury poisoning.