38 weeks pregnant thigh pain is not necessarily the birth of the inner thigh, need to be identified according to the specific circumstances: 1, non-natal symptoms: may be due to late pregnancy, the gradual decline of the fetus into the basin, the fetal head oppression of pregnant women pelvic floor muscles, lumbar muscles and nerves, or pubic bone separation, which leads to pregnant women to appear lumbar pain, lower limb weakness, and the inner thigh pain, and so on. The inner thigh pain may also be caused by inappropriate activities, overwork or calcium deficiency. In this case, pregnant women should pay attention to rest, avoid standing for a long time, can be appropriate local massage to relieve discomfort, at the same time should pay attention to do a good job of prenatal checkups and preparations, reasonable nutrition and diet, to ensure adequate sleep, appropriate activities, avoid overwork, and keep in a good mood; 2, symptoms of labor and delivery: if the pregnant woman in the 38th week of pregnancy, there is a pain in the inner thighs, and have a regular and gradually strengthen the uterine contractions as well as the feeling of fetal descent, redness, and the feeling of the baby’s birth. If a pregnant woman has pain in the inner thighs, regular and gradually increasing uterine contractions and a sense of descent of the fetus, the performance of the red, accompanied by the disappearance of the cervical canal, the dilatation of the uterine opening and the descent of the fetal prelude, it means that labor is about to take place, and it is recommended to go to the hospital in time.