Sacroiliitis

Sacroiliitis is a type of arthritis that affects the sacroiliac joints, which are located between the sacrum (a triangular bone at the base of the spine) and the ilium (the largest bone in the pelvis). The condition is characterized by inflammation of the sacroiliac joints, leading to pain, stiffness, and limited mobility.

Causes and Risk Factors

Sacroiliitis can be caused by a variety of factors, including:

Symptoms

The symptoms of sacroiliitis can vary in severity and may include:

  • Pain in the lower back, buttocks, or thighs
  • Stiffness or limited mobility in the hips or lower back
  • Difficulty walking or climbing stairs
  • Pain when standing up from a seated position
  • Pain when bearing weight on the affected joint
  • Swelling, redness, or warmth around the affected joint
  • Fever (in cases of infectious sacroiliitis)

Diagnosis

The diagnosis of sacroiliitis is typically made based on a combination of:

  • Medical history and physical examination
  • Imaging studies (such as X-rays, CT scans, or MRI scans) to visualize the sacroiliac joints
  • Laboratory tests (such as blood work or joint fluid analysis) to rule out other conditions

Treatments

The treatment of sacroiliitis depends on the underlying cause and severity of the condition, but may include:

  • Medications:
    • Pain relievers (such as acetaminophen or ibuprofen)
    • Anti-inflammatory medications (such as corticosteroids or disease-modifying antirheumatic drugs)
    • Biologics (such as tumor necrosis factor-alpha inhibitors)
  • Physical therapy to improve mobility and strength
  • Occupational therapy to modify daily activities and reduce strain on the affected joint
  • Surgery (in severe cases, such as joint fusion or replacement)
  • Lifestyle modifications:
    • Maintaining a healthy weight
    • Exercising regularly (such as swimming or cycling)
    • Avoiding heavy lifting or bending
    • Using proper lifting techniques

Complications

If left untreated, sacroiliitis can lead to complications such as:

Prognosis

The prognosis for sacroiliitis varies depending on the underlying cause and severity of the condition, as well as the effectiveness of treatment. With proper management, many people with sacroiliitis are able to manage their symptoms and maintain a good quality of life.

Frequently Asked Questions (FAQs)

What is Sacroiliitis?
Inflammation of the sacroiliac joint, which connects the sacrum and ilium bones.

What are the symptoms of Sacroiliitis?
Lower back pain, buttock pain, stiffness, and limited mobility.

What causes Sacroiliitis?
Typically caused by inflammatory conditions, such as ankylosing spondylitis, or trauma, but can also be due to infection or osteoarthritis.

How is Sacroiliitis diagnosed?
Through physical examination, medical history, imaging tests like X-rays or MRI, and possibly blood tests.

Is Sacroiliitis contagious?
No, it is not typically considered contagious.

Can Sacroiliitis be cured?
Treatment can manage symptoms and reduce inflammation, but a complete cure may depend on the underlying cause.

What are common treatments for Sacroiliitis?
Pain relief medications, physical therapy, and in some cases, injections or surgery.

Can exercise exacerbate Sacroiliitis?
Certain exercises may worsen symptoms, while others can help manage them, depending on the individual case.

Is Sacroiliitis more common in certain age groups?
It can occur at any age, but is more commonly diagnosed in young to middle-aged adults.

Are there any lifestyle changes that can help manage Sacroiliitis?
Maintaining a healthy weight, avoiding heavy lifting, and engaging in gentle exercises may help alleviate symptoms.

Article last updated on: 18th October 2025.
If you have any feedback, please get in touch.

See more

 Conditions  Symptoms  Procedures

Diagnosis Pad
Medical AI Assistant with Differentials, Guidance, Transcriptions, Notes, Medical Encyclopedia and Explainable AI.
Download from App Store Download from Google Play
Available for iOS, macOS and Android.

Medical Disclaimer

The information provided is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay seeking it because of something you have read on this site. We we do not guarantee, and assume no legal liability or responsibility for the accuracy, currency, or completeness of the information provided.