Bleeding on the third day after intercourse, if it is not caused by pregnancy, for this case, you can observe for the time being. If the amount of bleeding is small, there is no need for special treatment. If there is a lot of bleeding, you can take oral medication to stop bleeding, such as tranexamic acid tablets, Anluoxin, Yunnan Baiyao and so on. Normally, the bleeding will stop in three days after taking the medicine. After the bleeding stops, you need to go to the hospital as soon as possible, check the cervical cancer screening TCT, HPV. if the results of TCT, HPV and other tests are not problematic, do not be too nervous and anxious. In addition, it is recommended that the patient also check the gynecological ultrasound to find out whether there are endometrial polyps, submucosal fibroids and other organic lesions in the uterine cavity.