Sacroiliac joint pain. do i need to see a doctor?

Yes: Typically sacroiliac or si joint pain is best diagnosed and treated by a physician. The physician can help determine the cause of the pain which can be secondary to: inflammation, trauma or an imbalance of forces acting on a joint. The physican can then determine the best treatment for the pain.

Probably: If it is causing prolonged pain and difficulty walking then see a doctor.