Yunnan Baiyao should not be used during breastfeeding. Both oral and topical Yunnan Baiyao can be secreted into the breast milk through the bloodstream and can affect the fetus. What should I do in this case? First, we should look for the cause of the disease, such as strain or chronic injury, and pay attention to the cause of it, such as the posture of holding the child or the posture when breastfeeding, and further correct it. In addition, you can apply physical methods, such as hot compresses or massage, to promote muscle tissue relaxation and inflammation, but also physical therapy, warm water belt, baby warmers or baking electricity can be carried out. If you have the conditions and time, you can go to the hospital and register with the physical rehabilitation department or the acupuncture department, all these means can be used without any effect on the fetus.