It usually begins at about ages 12-13 and continues until a woman is about 50 years old. Menstruation, or the menstrual period, is the monthly bleeding that occurs as a part of a woman's reproductive cycle. Most women have mild cramps as the menstrual period begins-having such cramps for a day or two each month is usually normal.
Some women have severe pain.
Painful menstruation is called dysmenorrhoea. Many women experience the pain and aggravation of dysmenorrhoea. Severe menstrual cramps in all but rare cases can, and should be, treated. If severe or unusual menstrual cramps are a problem for you, talk with your doctor about treatments that are now available. You will most likely be able to stay active every day of the month, free from the distress and disruption of painful menstrual cramps.