Men may experience localized pain during their first sexual intercourse for possible reasons: First, due to factors such as excessive erection or prolonged engorgement of the penis, which can cause localized chronic or acute pain. Second, the first sexual intercourse may appear foreskin edema or glans swelling, etc., can produce local pain, or because of excessive friction and local pain sensation. Third, if the man himself suffers from diseases such as foreskin or prepuce, local pain can occur because of increased surface tension after erection. Fourth, such as the process of sexual life caused by the local foreskin break, can appear local pain, accompanied by bleeding. Fifth, if you do not pay attention to personal hygiene during sex, resulting in local infection, there may be local pain, accompanied by increased secretions or abnormal changes in urination, you need to carry out relevant laboratory tests to determine whether there is an infection.