Dysmenorrhea (painful periods / difficulty in monthly flow) is experienced as pain along with cramps associated with the menstruation cycle. It is the most commonly found pain among women. Dysmenorrhea can be classified into two types primary and secondary dysmenorrhea. Symptoms symptoms typically last from 1 to 3 days. Pain usually begins around the time when menstruation begins. The pain is usually in the pelvis or lower abdomen. Other symptoms may include back pain, diarrhea, or nausea. The cramping and pain usually start a day or two before the period begins with the most severe discomfort occurring on the first day of menstruation. There are more than 150 symptoms known and some of the more common ones include depression, bloating, fatigue, social withdrawal, angry outbursts, breast tenderness, vague aches and pains, menstrual migraines, and weight gain. The cause primary dysmenorrhea is caused due to excessive levels of prostaglandins; hormones that make the uterus contract during menstruation and childbirth. Its pain mostly results from contractions of the uterus that occur when the blood supply to its lining (endometrium) is reduced. Other factors that may make the pain of primary dysmenorrhea even worse include a uterus that tilts backward (retroverted uterus) instead of forward, lack of exercise, psychological or social stress, smoking, drinking alcohol, being overweight, and early beginning of the menstruation cycle( before age of 11.) it is more common among those with heavy periods, irregular periods, whose periods started before twelve years of age, or who have a low body weight. Conditions that should be ruled out include ectopic pregnancy, pelvic inflammatory disease, interstitial cystitis, and chronic pelvic pain.