Menstrual cups are used to organize menstrual blood during menstruation, which can avoid the need to use sanitary napkins and tampons. The use of menstrual cups can lead to side effects, such as allergies, most are made of silicone, which is inherently toxic, and excessive friction can lead to infections of the hymen, vaginal walls, and friction bleeding. If a woman’s menstrual blood flow is too much will also lead to overflow of menstrual blood, resulting in blood stains on the vulva, for unmarried women can not be used, women in the occasional use of menstrual cups is OK, not often used. Women should pay attention to keep warm during menstruation, pay more attention to rest, and keep the vulva clean and hygienic to avoid infection.