If a woman is not menstruating and has light vaginal blood, she may be ovulating or suffering from cervical polyps, which can easily cause bleeding after coitus. If the menstrual cycle is usually more regular, and the menstrual period and the amount of menstrual blood are relatively stable, occasionally ovulation vaginal bleeding symptoms, probably due to the body of estrogen fluctuations caused by a small amount of endometrial shedding symptoms. It does not need special treatment and can be cured in about 2-3 days. If it is not the ovulation period, but after coitus, there is faint blood in the vagina, probably because of chronic cervicitis caused by cervical polyps, when coitus contact with the polyps caused by bleeding symptoms, it is recommended to do a gynecological examination, diagnosis as soon as possible after the surgical removal, after the removal of the need to do pathological examination, to rule out the cancerous situation.