Nearby tissues become red, swollen, and painful. The pain of endometriosis usually worsens over the years. PID is usually caused by sexually transmitted diseases . It causes menstrual pain that usually lasts longer than menstrual bleeding. The pain may begin early or late in the period and usually lasts for several days.
Fibroids are tumors of the uterine wall.
They usually do not cause menstual pain. Occasionally they may cause pain during periods when they involve the inner cavity of the uterus. It may intensify normal menstrual cramps and may cause cramps at other times, too. This is a method of examining the uterus, tubes, and ovaries for any abnormalities. It is usually not uncomfortable, and it does not take very long.