The main reasons for pain in the lower body after sex include vaginal inflammation, vaginal dryness, excessive intensity of sex, and hymen tearing. If a woman has vaginal inflammation, it is more likely to cause abnormal vaginal discharge, which may cause some pain during sex. You need to judge whether your vaginal discharge has obvious odor or itching. If present, you can determine the type of inflammation by using a white belt routine and then treat the symptoms. If the hormone level in the body is disordered, it may also cause vaginal dryness, which can be improved by the use of estrogen through the hormone 6 test. If the penis hits the cervical opening with too much force during sex, it may cause pain. If a woman has sex for the first time, she may experience pain due to hymen tearing and vaginal wall expansion, which are normal physiological phenomena.