Dysmenorrhea is defined as pain and swelling in the lower abdomen, accompanied by back pain or other discomfort, before or after menstruation or during menstruation in women whose symptoms seriously affect their quality of life. This phenomenon is more common among women. The symptoms of dysmenorrhea vary from person to person, from mild abdominal discomfort and swelling to more intense pain, even sweating profusely, accompanied by pallor, cold extremities and other symptoms, or in more severe cases, inability to do normal work and study and the need to rest in bed. Generally speaking, dysmenorrhea is divided into two categories, one is primary dysmenorrhea, which refers to dysmenorrhea without organic lesions in the reproductive organs, mostly due to improper diet, lifestyle habits, and some congenital conditions of the body; the other is secondary dysmenorrhea, which refers to dysmenorrhea caused by organic pelvic diseases, such as endometriosis and adenomyosis. This kind of dysmenorrhea needs to be examined in the hospital for active treatment. In general, menstrual cramps are mainly prevented by keeping warm during menstruation, avoiding colds, keeping your mood relaxed, eliminating tension and worries, developing good work and rest, and not staying up late to have a good sleep. You should eat a balanced diet, do not eat cold, spicy and stimulating food, and forbid tub baths and cold showers during menstruation.