On the one hand, bleeding during coitus is due to the overly vigorous movements during coitus, which causes a greater impact on the cervix. On the other hand, with the existence of vaginitis, chronic cervicitis, cervical polyps and other gynecological inflammation. So this time must pay attention to more rest, moderate coitus, coitus pay attention to gentle movements, reduce the number of coitus, 2-3 times a week can be, coitus time is best not more than half an hour. If there is still persistent bleeding, you should actively seek medical treatment, improve the uterine adnex ultrasound, speculum examination of the vagina, leukorrhea routine, cervical pre-cancer screening and other tests, to clarify the specific causes of the disease, and actively receive treatment. If there are cervical polyps, chronic cervicitis, you need to use gynecological antibacterial gel and other drugs externally vaginally.