For women approaching puberty, more leucorrhea accompanied by the development of secondary female sexual characteristics, such as breast development and the growth of pubic and axillary hair, indicates the imminent onset of menstruation. For mature women, premenstrual manifestations vary from person to person. Some women may experience breast swelling and pain before menstruation, while others may experience dizziness and drowsiness, or manifest as lower abdominal pain or lumbosacral pain. Physiological leucorrhea often occurs before menstruation, during pregnancy, during ovulation, and during this period the leucorrhea is characterized as transparent, slightly sticky, egg-white like, and odorless. But if it is pathological leucorrhea, the disease is different, the leucorrhea properties are also different, common cheese leucorrhea or bean curd-like leucorrhea, often suggesting mycotic vaginitis. If the leucorrhea is thin and purulent, yellow-green and foamy, it is considered to be a disease such as trichomonas vaginalis. Therefore, once patients find abnormal leucorrhea, they need to go to the gynecology department of the hospital for routine leucorrhea examination in order to make a clear diagnosis and then carry out symptomatic treatment.