Endometriosis is a very complicate disease which may occur in their reproductive organs. Basically, the name is developed from the word "endometrium," which is the tissue that locates inside of the uterus, and it expands and sheds continually each month in the menstrual cycle. In endometriosis, as tissue grows outside of uterus, thus endometrium can be found outside the uterus. Sometimes, it also may be found in other areas of the body. In these areas, which are outside the uterus, the endometrial tissue could form into abnormal tissue, which may be various forms, like "nodules," "tumors," "lesions," "implants," or "growths." These growths can cause pain, infertility, and other problems included.

Generally, endometrial growths more commonly occur in the abdomen, where often are associated with the ovaries, fallopian tubes, the ligaments attaching to the uterus, the area between the vagina and the rectum, the outer surface of the uterus, and the lining of the pelvic cavity. Occasionally, the growths may also be observed in abdominal surgery scars, on the intestines or in the rectum, on the bladder, vagina, and cervix.

Unfortunately, in endometriosis, as endometrial tissue expands outside the uterus, there is no way to leave the body, not like the lining of the uterus. The outcomes of this condition often result in the internal bleeding, degeneration of the blood and tissue shed from the growths, inflammation of the surrounding areas, and formation of scar tissue. At other times, as the endometrial tissues rely on the location of the growths, can destroy the growths which form endometriosis to new areas, the formation of adhesions. What’s worse, when the growths are in or near the intestines, it will cause intestinal bleeding or obstruction. Sometimes, if the growths are on or in the bladder, it will lead to the interference with bladder function. In many cases, symptoms will get worsen over time since the various treatment can not cure the endometriosis.

Although there are various treatments for endometriosis over the years, no definitive treatment has yet been found. The symptoms will often turn back after the removal of the ovaries. For surgery treatment, a high rates of continuation or recurrence that women have to face. For better endometriosis herbal treatment, Traditional Chinese Medicine is recommended, which fully consider the safe of patients without side effect, protecting the body during the any time, no other complications producing. Now, Fuyan pill as Traditional Chinese Medicine has been considered a definitive cure. Fuyan pill are usually prescribed for the pain of endometriosis. Treatment of Fuyan pill aims to stop ovulation for as long as possible and can sometimes incite endometriosis into remission during the time of treatment and sometimes for months or years afterwards based on the various conditions.