According to the degree of dysmenorrhea, it can be classified into three degrees clinically: first, mild dysmenorrhea, mild dysmenorrhea means that the patient experiences pain in the abdomen during or around the period, but the pain is not particularly obvious, and the patient can work and live normally, and usually does not need to be treated with painkillers, which is called mild pain; second, moderate pain, moderate dysmenorrhea means that the patient experiences obvious dysmenorrhea during or around the period, and it is even accompanied with symptoms like nausea Vomiting, unheated limbs and other symptoms. Moderate dysmenorrhea requires painkillers to relieve its symptoms; third, severe dysmenorrhea, severe dysmenorrhea refers to obvious abdominal pain during or around menstruation, and abdominal pain will radiate to the lumbosacral, perineum, anus and other parts of the body. At the same time, patients will be accompanied by pale, cold sweat, cold limbs and other symptoms. At this time, the use of painkillers is completely ineffective. In this case, no matter hot compresses on the stomach or other pain relief measures are taken, dysmenorrhea can not be significantly relieved. The exact level of pain of menstrual cramps is actually related to each person’s tolerance of pain, i.e. to each person’s pain threshold. Some people will find the pain tolerable, while others will find it unbearable to live with. So how painful menstrual cramps are clinically, this also varies from person to person.