There are many conditions that can cause this, and the specific causes need to be clarified: 1. Excessive frequency and amplitude during intercourse can cause back pain in women, which can be relieved after rest. 2. When women have gynecological inflammation such as cervicitis and pelvic inflammatory disease, back pain is likely to occur after intercourse. The diagnosis can be made clearly through vaginal discharge examination and abdominal ultrasound. 4. Back pain can also occur after intercourse before and after menstruation, and can be accompanied by vaginal bleeding, prolonged menstruation, delayed menstruation, etc. 5. The symptoms can also easily cause miscarriage or premature birth. Therefore, when back pain occurs after intercourse, it is important to pay attention and further clarify the cause to avoid delaying the condition.