For 15% to 30% of people with long-term lower back pain, one of the sacroiliac (SI) joints, which connect the pelvis with the spine, is the source. But it’s not always easy for people or their doctors ...

Sacroiliac (SI) joint issues can occur with osteoarthritis, injury, or other health conditions. They can cause either sharp or tingling pain. You may experience SI joint pain as a sharp, stabbing pain ...

People may experience sacroiliac (SI) joint pain, also known as sacroiliitis, as a sharp or shooting pain in the lower back and buttocks. SI joint pain may or may not radiate down the legs. SI joint ...