Primary dysmenorrhea is a result of the normal production of prostaglandins--chemical substances that are made by cells in the lining of the uterus. The lining of the uterus (which has built up and thickened during the early stages of the menstrual cycle) breaks up and isscooped off at the end of the cycle and releases prostaglandins. The prostaglandins, in turn, contracts the uterus to a great extent that the blood supply is cut off temporarily, depriving the uterine muscle of oxygen thereby, resulting in pain. Women who suffer painful contractions may be producing excessive amounts of prostaglandins. It is also that some women are more sensitive to them. Pre-menstrual syndrome is a group/cluster of symptoms experienced prior to the commencement of menses.Distention and pain in the abdomen, dizziness, diarrhoea, tenderness in the breasts are common PMS symptoms. So,stop worrying!
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answered by r k