Motherwort can shrink the uterus. From the pharmacological point of view of Chinese medicine, it actually has a two-way regulating effect, on the one hand it can contract the uterus, and on the other hand it can relax the smooth muscle of the uterus, which means it can contract the uterus and ease the contraction of the uterus. So it has a two-way regulation, when the contraction is very strong, adding motherwort will have a relaxing effect. If you need to contract the uterus, like when there is bruising or blood clots, and when there is dysmenorrhea, you can use motherwort to promote uterine contraction and expel the bruised blood and residual meconium tissue from the uterus by accelerating the contraction of the uterus. Therefore, according to the specific performance of the patient, targeted regulation is carried out, so motherwort can be regulated in both directions.