A healthy menstrual cycle is one that comes regularly, approximately every 26-30 days, with no premenstrual physical or emotional discomfort, no pain, moderate flow (needing to change a pad or tampon every 3-4 hours), no clots, no spotting and that consistently lasts 4-5 days. The color should be a medium red color, not too dark and end concisely (no lingering spotting beyond the fifth or sixth day). If there is any deviation from the above ranges, we defines it a symptom or imbalance according to Eastern Asian medicine. Sometimes, it is not yet reflected to the discomfort to body, or milder PMS. However, it is time Eastern Asian medicine shall come to intervene. We call it preventive medicine, not to wait until medical exams show. Menstrual irregularities can be caused by a variety of conditions, including stress, pregnancy, hormonal imbalances, infections, malignancies, diseases, trauma, and certain medications. While conventional medicine addresses structure issues by using hormone medicine or surgery, Eastern Asian medicine address issues in a functional way. It can work independently or in collaboration with conventional medicine.