There is no clear evidence that plasters will lead to fetal malformations. Due to the unclear composition of the plasters, the medicines pasted on the skin will be absorbed through the skin, such as plasters containing musk, saffron and other blood-activating ingredients pregnant women need to use with caution. As some of the creams may contain ice chips, musk, saffron and other stimulating ingredients, which will adversely affect the pregnancy, resulting in some stimulation of the uterus. Therefore, for this type of ointment, try not to use during pregnancy. Often some of the ointment instructions will also indicate that pregnant women are prohibited or caution, so it should be used in strict accordance with medical advice to avoid the impact on the fetus. If you need to use ointment, you can use it under the guidance of the doctor, choose the category applicable to pregnant women, to avoid blind use of medication, resulting in adverse consequences.