Menstrual underwear refers to a type of underwear that women can use to keep their menstrual underwear hygienic during the menstrual period and avoid the sultry heat that causes damage to the skin. It is called physiological underwear. During menstruation, every woman will have a common trouble. She is always worried about some small troubles during the day. She will wake up in the middle of the night for fear of leakage. You can choose to wear women's menstrual underwear.