Can pregnant women use topical pain patches for lower back pain?
Generally, pregnant women with back pain should not use medicated plasters. The detailed explanation is as follows:

Most medicated plasters contain ingredients such as musk, safflower, and borneol, which promote blood circulation. These ingredients may cause uterine contractions, increasing the risk of miscarriage or premature birth. Additionally, during early pregnancy, the fetal organs are developing and are more susceptible to the effects of medication. Therefore, it is not recommended for pregnant women to use medicated plasters.
However, if the back pain is severe, specific types of topical ointments, such as erythromycin ointment or mupirocin ointment, may be used under a doctor's guidance to alleviate pain symptoms, with minimal impact on the pregnant woman's body and the fetus.
In daily life, even when using approved topical ointments, pregnant women should follow medical advice regarding dosage and duration of use. Additionally, symptoms can be relieved through appropriate bed rest, gentle massage of the lower back, heat application, and other methods.