Things you can’t do when you have your period: First, you can’t have intercourse. Because the cervical canal is slightly open at this time. If you have intercourse at this time, it will lead to bacterial reflux causing pelvic inflammatory disease. Sometimes menstrual blood will flow backwards, causing pelvic endometriosis, pelvic inflammatory disease, tubal inflammation, which then leads to infertility, ectopic pregnancy, and some people will experience dysmenorrhea. Second, choose a shower when bathing, not a sitz bath. Pay attention to hygiene and wash your vulva clean every day. Wash your hair with a hair dryer, do not eat icy food, and eat less spicy and stimulating food.