When a girl reaches the age of 14, ovulation and menstruation will commence as part of her normal physiology. This is a natural phenomenon. However, for some girls, menstruation is accompanied with heavy bleeding and pain, such as lower abdominal cramps, lower back pain, headaches, neckaches, that adversely affect their daily life. This is medically known as dysmenorrhea.
Western medicine does not think a great deal about this. Doctors will prescribe painkillers or anti-inflammatory medicine, and tell you that this situation will correct itself after childbirth. And for some sufferers, dysmenorrhea still haunts them after childbirth. Doctors then say this situation will resolve itself after menopause.