Girls bleeding after exercise may be menstruation, ovulation bleeding or hymen rupture, gynecological inflammation, etc., whether normal to be analyzed in conjunction with the causes of bleeding. 1. Normal: girls bleeding after exercise may be close to the menstrual period itself, the phenomenon of exercise just after the onset of menstruation, and exercise is not directly related to the phenomenon, is normal. Some women ovulation due to changes in hormone levels will cause a small amount of bleeding, and exercise may make the bleeding increase outflow, but also belong to the normal phenomenon. Some women may also experience an accidental rupture of the hymen during strenuous exercise, which may cause a small amount of bleeding. All of the above bleeding after exercise is normal and does not require special treatment. 2. Abnormal phenomenon: girls bleeding after exercise may also be related to gynecological inflammation, such as cervicitis, cervical polyps and other gynecological diseases, inflammatory stimulation and polyps will lead to the cervical mucous membrane becomes thin and brittle, the external impact or after strenuous exercise may lead to irregular bleeding phenomenon. In addition, girls who have a history of sexual intercourse and cause preeclampsia after exercising without knowing that they are pregnant will also bleed, accompanied by abdominal pain and lumbago discomfort. The above situations are abnormal and need to be given symptomatic treatment after complete examination.