A small amount of bleeding in early pregnancy is considered abnormal, mainly due to preeclampsia, cervical lesions, ectopic pregnancy and other diseases. 1. Pre-eclampsia: In early pregnancy, due to the instability of the embryo, some women in early pregnancy may experience small amounts of vaginal bleeding due to a variety of factors. When the mother is exposed to toxic and harmful substances, fetal genetic abnormalities and other factors, it will lead to a small amount of vaginal bleeding, abdominal pain and other symptoms. 2. Cervical lesions: Some women may already have cervical diseases before pregnancy, such as cervicitis, cervical polyps and other diseases, which may cause local capillary rupture of the cervix due to changes in hormone levels, further inducing bleeding. 3. Ectopic pregnancy: Ectopic pregnancy generally means that the fertilized egg does not settle in the uterine cavity, but may settle in other parts of the fallopian tube. As the embryo develops and enlarges, it will lead to the rupture of the fallopian tube, which will cause bleeding, abdominal pain and profuse sweating. There are many other causes of small amount of bleeding in early pregnancy, patients are advised to seek medical examination in time, clarify the cause of the disease and follow the doctor’s instructions to deal with the treatment, so as not to delay the condition.