Dysmenorrhoea also known as colic menstrualis a pain pelvic that occurs before or during the menstrual, Which affects about 50% of women of childbearing age. It may be primary or secondary, depending on the presence or absence of structural changes in the reproductive system.
A dysmenorrhea is painful menstruation in the absence of lesions in the pelvic organs. Generally, accompanying the normal menstrual cycles and occurs soon after the first menses, stopping or decreasing the intensity around the 20’s or pregnancy. It is due to increased production of some substances by the uterus called prostaglandins, which promote uterine contractions painful. The pain is usually mild, causing cramping, discomfort, heaviness in the belly or back, but can also be mild, causing, in addition to discomfort, feeling of malaise, diarrhea and headache.
Dysmenorrhea is related to changes in the reproductive system, which can be endometriosis, fibroids uterine infection. Abnormalities in the anatomy of the uterus or vagina of congenital origin. Another cause of secondary dysmenorrhea is the use of intrauterine device (IUD) as contraceptive method. Usually begin to appear two years after menarche.
The dysmenorrhoea can be primary or secondary depending on the presence or absence of structural changes in the reproductive system. Most women will suffer this degree of impairment at least once during their reproductive years. The increased risk is associated with younger age and medical history of any of the conditions associated with secondary dysmenorrheal.
Primary:
Nulliparity (never having had children)
Obesity
Smoking
Family history
Secondary:
Pelvic infection
STDs
Endometriosis
Primary dysmenorrheal occurs during the normal ovulatory cycles. Women with primary dysmenorrhea have the muscle activity increased with increasing uterine contractility and frequency of contractions. Prostaglandins are unrestricted during menstruation due to the destruction of the endometrial cells and the resultant release of their contents.
It is believed that the release of prostaglandins and other inflammatory mediators in uterus is one of the main factors causing dysmenorrhea. The levels of prostaglandin shown to be much higher in women with severe menstrual pain than in women who have little or no menstrual pain. 
The cramping related with dysmenorrhea more often than not begins a few hours before the start of bleeding and may continue for a few days. The pain is usually described as being in the lower abdomen, possibly radiating to the legs and lower back. Other symptoms associated with primary dysmenorrhea are nausea and vomiting, diarrhea, back pain and migraine.
The name is ugly and weird, and the pain it causes is pretty boring. You know what?
You know that pain that we feel women every month at the time of menstruation? So, this is such dysmenorrhea, also known as menstrual cramps. It is a pelvic pain that occurs before or during the menstrual period, which affects about 50% of women of childbearing age.
Dysmenorrhoea - Reproductive Changes. Get more information on Irregular Menstruation and Irregular Periods Remedies. Also get more information how to treat Menstrual Cramps.