Back pain is not necessarily pregnancy, and pregnancy does not necessarily mean back pain. To determine if you are pregnant, you should first observe the changes in your menstruation. For women of childbearing age and women who usually have regular menstruation, if you have a recent history of sexual intercourse, consider pregnancy once your menstruation is delayed for more than 10 days. Second, pregnancy can be ruled out by a blood test for chorionic gonadotropin or a urine test with a pregnancy test. Once a woman is pregnant, she may also experience breast tenderness and nipple tingling, and her basal body temperature may rise by 0.2-0.5°C or more. Therefore, to determine whether a woman is pregnant, she should not rely on her back pain, but should take into account her medical history, pay attention to her menstruation, and combine her body temperature and clinical manifestations to determine whether she is pregnant.