Reddish-brown leukorrhea is usually caused by blood in the leukorrhea. There are many reasons for blood in the leukorrhea. Patients with bloody leukorrhea must be alert to malignant tumors such as cervical cancer and uterine body cancer, while benign lesions such as cervical polyps, severe chronic cervicitis, intrauterine devices, senile vaginitis, and submucosal fibroids may also cause red-brown leukorrhea. Brown leukorrhea is often formed by a mixture of very small amounts of bleeding and is associated with dysfunctional uterine bleeding or cervical lesions and requires further investigation. The normal leucorrhea, or physiological leucorrhea, is usually white and thin, sticky, with little volume and no fishy odor, called physiological leucorrhea, which usually increases slightly before menstruation during ovulation, after menstruation or during pregnancy. In conclusion, the brownish-red color of the leucorrhea should actively go to the hospital for further examination and timely treatment after clarifying the cause.