Patient, female, 28 weeks old. Three months after cesarean section, she has severe lumbar pain, which even affects her sleep, the pain is not fixed and extends to the lumbar vertebrae, she sweats a lot and is weak, has poor appetite, and has dry stools for 2-3 days. The tongue is pale and fat with little coating, and the pulse is thin. Diagnosis: lumbago, disharmony of Ying and Wei. Prescription: Gui Zhi 15, Sheng Bai Shao 20, Roasted Licorice 12, Ginger 18, Jujube 12, Ginseng 6 (decoction separately), Salt Eucommia 20, Fire Ma Ren 12, Chen Pi 9, 7 doses, decoction, 1 dose daily in 2 doses. After a week of follow-up, the feedback is good, sweating significantly reduced, occasional lumbar pain in the afternoon, 2 lines of stool day, 5 days after taking the medicine lumbar pain eight out of ten.