First of all, it is important to clarify from which part of the body the blood comes. In the first case, it is possible that the blood is coming from the uterine cavity to the external vaginal opening. In the second case, it could be blood from inside the anus. You need to go to the hospital for a gynecological examination and gynecological ultrasound, and have blood drawn for human chorionic gonadotropin and progesterone tests. When the blood comes from inside the vagina, it is caused by a small amount of exfoliation of the endometrium. The gynecological ultrasound is good for embryonic development and conforms to the gestational week, pay attention to proper rest and avoid increasing abdominal pressure exercise. Eat more food containing coarse fiber, also keep the bowels open to prevent constipation from occurring, and give fetal preservation medication if necessary. If the blood comes from inside the anus, most women have hemorrhoids in combination. After pregnancy, you should also pay attention to eating more fresh vegetables and fruits to keep your bowels open. You can also take topical medication under the guidance of your doctor.