The pelvis is the term for the area that consists of the sacrum and hip bone as well as the soft parts (muscles, ligaments, etc.) that lie around. Pelvic pain can be caused by several things, for example, an inflammation or disease of an internal organ such as the uterus or prostate can cause pain here. The most common is of course  muscle and joint-related pain, and then it is the pelvic joints that usually create the problem (including the symphysis on the front).  In this article you will learn more about what SI joints are, what happens when you get a pelvic pain and what the solution may be