Clitoral masturbation on the 3rd day of menstruation is usually not a problem, but you need to pay attention to strict hygiene and cleanliness to avoid retrograde infection. During menstruation, the endometrium sheds blood, the cervix opens wider, and the woman’s body is more susceptible to injury, so there is a greater likelihood of infection of the reproductive system. If the pubic area, hands, sex toys, etc. are not clean, pathogens can more easily enter the bloodstream through the uterine wall, leading to vaginitis, pelvic inflammatory disease and other diseases. Therefore, during menstruation to keep the pubic area clean, warm water to wash the vulva, change frequently; wash your hands before and after masturbation, the frequency can be moderate.