The reason why pregnant women cannot apply plasters after their feet are broken is mainly because of the following two reasons: 1. There are musk and other ingredients in plasters, which may lead to absorption of musk by the human body after applying plasters, resulting in an impact on the fetus, which may lead to miscarriage and malformation and other related situations. 2. If the plaster is applied to activate blood stasis and dilate blood vessels locally, it will lead to an increase in the amount of local blood seepage, which will lead to an increase in pain symptoms. Therefore, after a pregnant woman’s foot sprain, she must first apply cold compresses, which can reduce the amount of local blood seepage and external fixation of the ankle joint, preferably using a brace or ankle brace for fixation, in order to protect the injured ligaments from being further stretched, leading to aggravation of the injury. In addition, the injured foot should be elevated above the level of the heart in order to effectively promote the metabolism and elimination of blood stasis and inflammatory edema through gravity.