Hysterectomy is one of the commonest surgical procedure in females in which uterus is removed. The main signs which lead to an option of hysterectomy are abnormal vaginal bleeding (bleeding that occurs from vagina either at wrong time of month or in inappropriate amount and constant bleeding. Other reasons can be Pelvic Inflammatory Disease (abnormal pain, tenderness, fever and a vaginal discharge), Cervical dysplasia (mainly caused by infection of cervix by HPV), uterine fibroids (benign tumors that causes abnormal bleeding, pelvic pressure which leads to frequent urination), endometriosis (abnormal growth of cells which lead to pain and infertility), uterine prolapse (vaginal support begins to lose its muscle tone and sag) and also 10% in case of cancer of uterus.
Problems that result in a hysterectomy are usually ones you have had other treatments for without success. These include uterine fibroids or tumors, endometriosis, excessive vaginal bleeding, and excessive pelvic pain.
Indications that you need a hysterectomy are reproductive cancers, endometriosis, adenomyosis, chronic pelvic pain, severe cases of placenta previa, placenta percenta, as well as different forms of vaginal prolapse. Hysterectomy is often advised and done as a last resort due to the risks that this procedure entails. For more information, follow this link: http://www.ask.com/wiki/Hysterectomy#Indications