There are many reasons for sciatic nerve pain in pregnant women, the most common reasons include lumbar disc herniation, hormonal changes, fetal compression, etc., as follows: a. Lumbar disc herniation: pregnant women have lumbar disc herniation, especially in late pregnancy, the increase in weight will increase the burden on the lumbar spine, which will lead to sciatic nerve pain symptoms in patients. Hormonal changes: Hormonal changes after pregnancy can cause the pelvis to be in a relaxed and unstable state, causing local compression, which can also lead to sciatic nerve pain symptoms. Third, fetal compression: In late pregnancy, due to the increasing size of the fetus or due to maintaining a posture for a long time in daily life, it will lead to compression of the sciatic nerve, which will lead to sciatic nerve pain symptoms. After a pregnant woman has sciatic nerve pain symptoms, she should avoid prolonged sitting and standing, reduce local stimulation, actively apply heat to the area, and cooperate with physical therapy to improve the patient’s clinical symptoms.