Pregnant women flashing to the waist, if it is not serious generally does not have a significant impact on the fetus. But if it is more serious flash to the waist, may affect the fetus, need to timely go to the hospital gynecology department to do routine obstetric examination. If everything is normal during the maternity checkup and there is no obvious abdominal pain or abnormal vaginal discharge, the problem is generally not serious. For minor flash to the waist, mainly local muscle, ligament and other soft tissue injury. The main treatment is bed rest and resting, and local physiotherapy can be applied with hot compresses. Avoid drugs as much as possible because they may affect the fetal development. If the pain in the lumbar area is obvious, especially if it affects normal standing or walking, pay attention to the possibility of combined lumbar fracture, you need to go to the hospital in time to find an orthopedic surgeon for an interview, combined with the preliminary judgment of physical examination.