During menstruation, due to pelvic congestion and the action of prostaglandins, some women experience discomfort in the lower abdomen, lumbosacral drop, and some experience painful uterine contractions. This situation can be warmed with a hot water bag to warm the stomach hot compress, can promote local blood circulation, prevent the uterus cold, the use of hot compresses can reduce abdominal pain. If the amount of menstrual blood is particularly high, the water temperature should not be too high, warm is appropriate, also pay attention to diet during menstruation, less spicy stimulating and cold food to prevent dysmenorrhea. Also pay attention to menstrual hygiene, change underwear and sanitary napkins regularly to avoid infection.