Masturbation is not recommended for patients during their menstrual period. Masturbation during menstruation may cause some adverse effects on the patient, mainly in the following two aspects: First, masturbation during menstruation is particularly likely to cause infection. Women have blood in their vagina during menstruation, and blood is the best petri dish for bacteria, so masturbation is very likely to cause infection if you do not pay attention to hygiene. This is especially true when you use a masturbator to enter a woman’s vagina, which is more likely to cause infection, and this vaginal infection can easily cause an upstream infection, leading to pelvic inflammatory disease. The pelvic inflammatory disease will not only affect the health and sex life of the patient, but also affect the fertility of the patient. Secondly, masturbation with vaginal bleeding during menstruation is particularly likely to cause endometriosis, such as endometriosis of the vaginal wall, endometriosis of the cervix or endometriosis of the pelvis, etc.