Most ectopic pregnancies cause soreness in the lower back, but soreness in the lower back does not indicate the presence of ectopic pregnancy because it is not a symptom specific to ectopic pregnancy. The cause of lower back pain is mainly due to the change of sex hormone levels in the body after the fertilized egg has been deposited, causing congestion in the pelvis, causing soreness and pain, which is a normal phenomenon. Normal intrauterine pregnancy can also cause soreness and pain in the lower back, as long as the local hot compresses, pay attention to rest, avoid excessive exertion. The main typical symptoms of ectopic pregnancy are pain in the left or right lower abdomen and irregular vaginal bleeding. If this phenomenon occurs, as soon as possible to draw blood to check the HCG value, to see whether there is a low phenomenon. If ectopic pregnancy is suspected, ultrasound should be done as soon as possible to clarify the diagnosis of ectopic pregnancy should be dealt with as soon as possible, whether it is conservative treatment or surgical treatment, need to be based on a comprehensive assessment of the decision.