The sour milk-like leucorrhea may be caused by hormonal changes during the menstrual cycle, which is a normal phenomenon and does not require any treatment; it may also be caused by gynecological diseases, such as gynecological inflammation. 1. Hormonal changes: leucorrhea is usually milky white or transparent, semi-solid, with no obvious odor. Therefore, if the leucorrhea is sour milk-like, if there is no odor and no vaginal itching, it is usually a normal performance caused by hormonal changes. 2, gynecological inflammation: If the leucorrhea is sour milk-like, accompanied by obvious odor and vaginal itching, consider vaginitis, cervicitis and other gynecological inflammation, especially mycotic vaginitis, the leucorrhea can be sour milk-like, curd-like, you need to perform routine leucorrhea, gynecological ultrasound examination to determine the specific cause. If infection is present, antibiotics or mycoplasma can be used to control the progress of the disease. Keep the perineum clean and dry, rinse the vulva with water, avoid bathing, and do not have intercourse.