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Sacroiliitis

Sacroiliitis is an inflammatory condition affecting the sacroiliac joints, which connect the lower spine to the pelvis. It can cause pain in the lower back, buttocks, or hips and may significantly affect mobili…

4 MIN READ· PHYSICIAN-REVIEWED· UPDATED 2026

Sacroiliitis is an inflammatory condition affecting the sacroiliac joints, which connect the lower spine to the pelvis. It can cause pain in the lower back, buttocks, or hips and may significantly affect mobility and posture. Symptoms may develop gradually and can be mistaken for mechanical back pain.

Because sacroiliitis is often associated with inflammatory rheumatologic conditions, accurate diagnosis is important for appropriate management.

What Is Sacroiliitis?

Sacroiliitis refers to inflammation of one or both sacroiliac joints. This inflammation can lead to pain, stiffness, and difficulty with prolonged standing or walking.

Unlike degenerative joint disease, sacroiliitis is driven by inflammatory processes rather than cartilage wear.

Common Symptoms

Symptoms may include:

  • Lower back or buttock pain
  • Pain that may alternate sides
  • Morning stiffness or stiffness after rest
  • Pain that improves with movement
  • Difficulty standing for long periods

Symptoms may vary in intensity over time.

What Causes Sacroiliitis?

Sacroiliitis may result from:

  • Autoimmune or inflammatory conditions
  • Immune-mediated joint inflammation
  • Mechanical stress contributing to joint irritation

In many cases, inflammation is the primary driver.

How Is Sacroiliitis Diagnosed?

Diagnosis involves a detailed evaluation, which may include:

  • Review of symptom patterns and activity response
  • Physical examination focusing on pelvic and spinal movement
  • Imaging studies to assess sacroiliac joints
  • Laboratory testing when inflammatory causes are suspected

Accurate diagnosis helps guide effective care.

Treatment Options for Sacroiliitis

Treatment is individualized and may include:

  • Anti-inflammatory strategies
  • Medications to manage immune-related inflammation
  • Advanced therapies for ongoing symptoms
  • Infusion-based treatments when clinically indicated
  • Physical therapy to support mobility and stability

Treatment plans are adjusted based on response.

When to See a Rheumatologist

A rheumatology evaluation may be appropriate if you experience:

  • Persistent lower back or buttock pain
  • Morning stiffness that improves with activity
  • Symptoms not improving with conservative care

Specialized care helps determine the underlying cause.

Our Approach to Treating Sacroiliitis

Our approach focuses on accurate diagnosis, individualized treatment, and ongoing monitoring. We aim to control inflammation and support long-term joint health through coordinated care.

Schedule a Consultation

If lower back or pelvic pain is persistent or affecting daily activities, scheduling a consultation can help clarify the cause and guide appropriate management.

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