Aunt period refers to the period of menstruation, during menstruation occasionally have sex once or twice, may be something, easy to induce infection, can also lead to endometriosis. During menstruation, the cervical opening is in a state of patency, the body’s immunity is low, and not paying attention to hygiene before and after sex may lead to infections in the uterine cavity, which can easily induce gynecological diseases such as endometritis and pelvic inflammatory disease, and in serious cases, it can affect the fertility of women. In addition, due to the presence of menstrual blood in the uterine cavity, during sexual intercourse, it may lead to part of the menstrual blood entering the pelvic and abdominal cavity, which may easily induce endometriosis, cause lead to chronic pelvic and abdominal pain, and in serious cases, it may also affect female fertility. During menstruation, women should prohibit sexual intercourse and also pay attention to lower body hygiene and change underwear regularly to prevent abnormalities. If you feel uncomfortable during menstruation, it is recommended that you go to the hospital in time and follow the doctor’s instructions for treatment.