If there are liquid dark areas in the uterine cavity found by ultrasound, it may be due to the following reasons: 1. Recent history of uterine operation, such as history of abortion or history of uterine removal surgery, the uterus has not returned to normal or the uterus is poorly restored, there may be stagnant blood in the uterine cavity, so there will be fluid. The actual fact is that you can take oral treatment with the Bajhen Yimu granules or Yimu Cao granules to promote the contraction of the uterus and expel the stagnant blood. 2, the uterine fluid may be produced by inflammation, for example, when there is endometrial inflammation will lead to a large amount of exudation and the formation of fluid, it is recommended to give anti-inflammatory treatment with the clinical history.