Generally speaking, coughing does not cause bleeding, but persistent and violent coughing can cause uterine bleeding to occur. At 10 weeks of pregnancy, due to the unstable embryo bed, the chorionic villi and the bottom of the uterus metaplasia connection is not strong, violent coughing will lead to increased abdominal pressure, affecting the embryo’s bedding situation. When coughing more violently causes greater abdominal pressure, it can stimulate the uterus to appear contraction, so that the outer layer of the gestational sac and the endometrium appeared misalignment, resulting in the rupture of tiny capillaries, triggering a small amount of bleeding in the uterus, through the vaginal outflow. Coughing and vaginal bleeding in the 10th week of pregnancy generally indicates that the embryo is abnormal in the uterus, and it is recommended that you consult a doctor in a timely manner, and under the guidance of the doctor, complete the relevant examinations to clarify the cause of the disease and take appropriate measures to treat it.