Occasional rubbing with brown discharge at 10 weeks of pregnancy may be a physiological phenomenon, or it may be caused by pathological reasons. 1. Physiological phenomenon: some pregnant women will still have a small amount of vaginal bleeding in 1-3 months of pregnancy, is a normal physiological phenomenon, will generally disappear after 12 weeks of pregnancy. 2. Pathologic causes: (1) Pre-eclampsia: abnormal embryonic development, endocrine disorders in pregnant women, abnormal thyroid function and other factors can lead to the occurrence of pre-eclampsia, manifested as vaginal bleeding, abdominal pain, abdominal drop and other symptoms. (2) Embryonic Fertilization: mostly due to chromosomal abnormality of embryo, endogenous hormone deficiency of pregnant women, uterine abnormality, etc., manifested as vaginal bleeding, lower abdominal pain and other symptoms, and the early pregnancy reaction will disappear. In addition to the above reasons, pregnant women suffering from vaginal inflammation, sexual intercourse during pregnancy, trauma and other factors may also lead to vaginal bleeding. Pregnant women need to go to the hospital for blood HCG, ultrasound and other tests to clarify the cause of bleeding and timely treatment.