You get one sacroiliac (SI) joint on either part of the human anatomy where your ilium and sacrum bones join together. Your sacrum could be the wide, flat bone tissue in the middle of your tailbone and lumbar back. Your ilium is frequently called your hip bone.
Unlike a great many other bones such as your leg or elbow, your SI moves that are joint small and is held as well as dense ligaments. Unexpected accidents or repetitive anxiety can result in the SI joint to become inflamed and painful. You may feel this discomfort in your buttocks or back.
Sitting for longer periods of the time can result in discomfort in your SI joint or aggravate pain that is existing.