Endometriosis is a disease of the female reproductive system. It is often painful and many times is hard to diagnose. In fact a definitive diagnosis cannot be made except by undergoing laparoscopic surgery. Endometriosis occurs when the endometrial tissue that lines the uterus makes its way to the abdominal cavity and implants of the organs there.

In most cases the endometrial cells implant on the ovaries, fallopian tubes and large intestine. In rare cases the endometriosis may spread upward into the sternum and chest cavity. To know about the most common endometriosis symptoms, you can have a look at various online sources.

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The endometrial tissue reacts the same way to a woman's monthly menstrual cycle as the lining of the uterus, except that when the nutrient-rich blood to slough off at the beginning of menstruation it has nowhere to go and accumulates in the abdominal cavity. It is this cycle of monthly endometrial cells and blood accumulation that causes many of the symptoms of endometriosis.

Trapped blood irritates the stomach tissue to create a cyst. These cysts can bleed or rupture and form scar tissue and adhesions. This scar tissue and adhesions can actually bind internal organs together causing pain and discomfort, especially during a woman's period.

The pelvic pain is a common symptom most associated with endometriosis. Many women associate this pain with their period but did not realize that it was caused by endometriosis. In fact, some women with endometriosis experience little or no pain while others experience severe pain.