Liquid condom is a kind of contraceptive gel used by women, usually about 5 minutes before intercourse, open the cap of the injection tube, inject the liquid into women’s vagina after padding the buttocks, which is conducive to vaginal absorption, and after a few minutes the liquid is absorbed by the vaginal mucosa, you can have intercourse. Liquid condom injected into female vagina has sterilization and spermicidal effect, and has a barrier effect, not only can contraception, but also can prevent sexually transmitted diseases, such as prevention of syphilis, AIDS, etc. It is easy to use, and can play a lubricating effect on the vagina, and has no adverse effect on intercourse. However, this liquid is an alkaline liquid and should not be used frequently to avoid changes in the vaginal environment, which may cause dysbiosis leading to the growth of pathogenic bacteria and vaginal inflammation, and some women are prone to vulvar allergy after using it.