White secretions on the underwear may be caused by the following reasons: First, women have gynecological inflammation, such as vaginitis, pelvic inflammatory disease, etc. These organ infections will have a certain amount of secretions. These secretions will gradually flow out with the vagina, that is, they will slowly adhere to the underwear. Different bacterial infections have different colors of secretions, for example, streptococcal infections can have white secretions and staphylococcal infections can have yellow secretions. Secondly, for married women, that is, women who have more sexual life, white discharge on their underwear for a long time may be caused by cervical tumors or cervical cysts. The reason is that a cervical tumor or cervical cyst tumor can easily break down or erode, which can cause bacterial infection and also lead to abnormal secretions, which can also lead to white secretions on the panties. Thirdly, it may be that the ovaries or fallopian tubes are inflamed, because the secretions caused by the inflammation of these parts can also flow out through the vagina, thus leading to white secretions on the panties. Fourthly, it could be an infection of the peritoneum, because the peritoneum of a woman is connected to the outside world through the ovaries, fallopian tubes and vagina. So when there is inflammation in the peritoneum it can also cause inflammatory secretions to flow out through the vagina, causing white secretions to appear on the panties.