Sacroiliitis

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Sacroiliitis is an inflammation of the sacroiliac joint. Inflammation may occur in the region of the sacroiliac joint. This joint is relatively inflexible and connects the sacrum to the pelvis. It is associated with a variety of infectious or inflammatory conditions. Pain occurs either unilaterally or bilaterally in the low back, buttock and upper leg.

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

• Heavy lifting, especially incorrect training or when muscles aren’t prepared for the activity
• A traumatic injury or sudden impact, such as a motor vehicle accident or a fall, affecting your spine, lower back, pelvis or buttocks
• Spondyloarthropathies, which include ankylosing spondylitis, arthritis associated with psoriasis and others
• Degenerative arthritis, also called osteoarthritis of the spine, causing degeneration of the sacroiliac joints, which can cause mild inflammation and pain
• Pregnancy, because the pelvis must stretch to accommodate childbirth
• Infection of the sacroiliac joint, sometimes caused by bacteria in food (brucellosis)

Another method of classifying its causes is-

• Bilateral & symmetrical

• Ankylosing spondylitis
• Reiter’s syndrome
• Enteropathic

• Bilateral & assymetrical

• Psoriatic arthritis
• Rheumatoid arthritis
• Juvenile rheumatoid arthritis

• Unilateral

• Gout
• Infection
• Osteoarthritis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

• A history of bone, joint or skin infections. Some people are more prone to infections, and an infection is one possible cause of sacroiliitis.
• Injury or trauma to your spine, pelvis or buttocks. Torn ligaments or trauma may create inflammation or infection of the sacroiliac joints.
• Urinary tract infection. This infection may spread from your urinary tract, which includes your kidneys, bladder and urethra, to your sacroiliac joints.
• Pregnancy. The pelvic bone’s expansion to prepare for childbirth may inflame the area around your sacroiliac joints.
• Endocarditis. This infection of your heart’s inner lining may spread to your sacroiliac joints.

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