The thing like snot on the underwear is mostly considered to be women’s leukorrhea, generally no fishy odor, and not accompanied by discomfort symptoms, is a normal phenomenon. Leukorrhea is a female vaginal secretion, mainly from the cervical canal and endometrial gland secretion, vaginal mucous membrane exudate mixture. The formation of leukorrhea is related to changes in estrogen in the body, and will also change with the menstrual cycle. Generally women in the ovulation period when the body estrogen level is higher, the amount of leukorrhea more, transparent egg white-like, and viscous, can be pulled into silk, but also accompanied by a sense of wetness of the vulva. In other stages, the amount of leukorrhea is relatively small, mostly white paste, highly viscous, not accompanied by a fishy odor, are normal physiological phenomena, will not affect women’s health. When a woman’s leukorrhea changes in character, color and so on, accompanied by a fishy smell, and even induces vulvar itching and other discomforts, it is considered to be the existence of gynecological inflammation, and need to actively seek medical treatment. It is recommended that women pay more attention to their own leukorrhea, and if abnormalities occur, they should seek medical treatment in a timely manner.