Women with dysmenorrhea should not eat crab during their menstrual period because crab is a cold food, which can easily cause menstrual bleeding during menstruation, resulting in painful periods and even reduced menstrual flow. However, you can eat crab in normal times, because crab meat is fresh and rich in protein, most women prefer to eat crab. Women should pay attention to their diet, especially during menstruation should not eat cold, spicy and stimulating food, and should not eat too cold fruits and cold drinks. During menstruation, the diet should be nutritious and light, you can eat lean meat, eggs, milk, seasonal fruits and vegetables. During the menstrual period, you should also pay attention to keeping warm to avoid getting cold, prohibit sexual intercourse and bathing during the menstrual period, pay attention to keeping your vulva clean and hygienic, wash your vulva every day and change your sanitary pads regularly.