Heavy bleeding at 6 weeks of pregnancy may be caused by difficult miscarriage, ectopic pregnancy, cervical polyps and other reasons. 1. Inevitable miscarriage: there may be a small amount of vaginal bleeding and other symptoms of pre-eclampsia, followed by an increase in the amount of vaginal bleeding, accompanied by worsening pain in the lower abdomen, gynecological examination can be seen in the dilated uterine orifice, you may see embryonic tissues or amniotic sacs blocked in the mouth of the cervix, combined with the clinical manifestations and gynecological examination and other definitive diagnosis, the need for timely removal of the uterus. 2. Ectopic pregnancy: it may also cause heavy vaginal bleeding at 6 weeks of pregnancy, accompanied by pain in the lower abdomen, when the rupture of the pregnancy site, there will be fainting and shock and other symptoms, combined with clinical manifestations, ultrasonography and puncture of the posterior fornix of the vagina can assist in the diagnosis, and need to comply with the doctor’s instructions for surgery. 3. Cervical polyps: large polyps can also cause heavy vaginal bleeding without abdominal pain, gynecological examination and ultrasonography can be a clear diagnosis, if necessary, need to perform cervical polyp removal, and the removed tissue will be sent to the pathology. When there is heavy bleeding in the 6th week of pregnancy, you need to go to the hospital in time to find out the cause and deal with it in time.