Ovarian cysts may cause blood in the leukorrhea. Ovarian cysts are sac-like structures that form in or on the surface of the ovaries. Ovarian cysts are usually not harmful and disappear on their own in most patients. However, in some patients, the cysts can grow in size, causing symptoms such as lower abdominal discomfort and menstrual abnormalities. The larger the cyst, the greater the risk of rupture. When a patient’s cyst ruptures due to impact, rapid growth, etc., intra-abdominal bleeding may occur, which may affect the ability of the ovaries to secrete hormones, which may cause blood in the leukorrhea. It is recommended that patients strengthen physical exercise, which is conducive to promoting metabolism and blood circulation, and slowing down the aging of organs, such as walking, yoga, jogging and so on, which are beneficial to the ovaries. Patients with ovarian cysts should go to the hospital in time and follow the doctor’s instructions for treatment to avoid delays.