A healthy, well-balanced woman will menstruate about every 25-31 days for 5-7 days. There need not be any discomforts – physical or emotional – before, during, or after the period. However, there are many imbalances that manifest themselves as painful or uncomfortable. Chinese medicine therapy can help to remedy this condition. Menstrual pain is estimated to affect up to 50 percent of women of reproductive age, and anywhere from 60 to 85 percent of teenagers.