Understanding Chronic Sacroiliac Joint Pain: Causes, Symptoms, and Treatment Options

May 10, 2024

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Chronic sacroiliac (SI) joint pain is a common and often debilitating condition that affects millions of people worldwide. The SI joint, located at the base of the spine where the sacrum meets the ilium, is responsible for transmitting weight and force between the upper body and the legs. When this joint becomes inflamed or damaged, it can cause persistent pain and discomfort in the lower back, buttocks, and legs[1].

In this comprehensive guide, we will explore the causes, symptoms, and treatment options for chronic SI joint pain, helping you better understand this complex condition and navigate your healthcare journey with confidence.

Anatomy of the Sacroiliac Joint

The sacroiliac joint is a complex structure that connects the sacrum (the triangular bone at the base of the spine) to the ilium (the large, wing-shaped bone of the pelvis). The SI joint is a synovial joint, meaning it is surrounded by a capsule filled with synovial fluid that lubricates and nourishes the joint.

The SI joint has several important functions, including:

  1. Transmitting weight and force from the upper body to the legs
  2. Providing stability to the pelvis and lower back
  3. Allowing for limited movement between the sacrum and ilium

Understanding the anatomy and function of the SI joint is essential for recognizing the potential causes and contributing factors of chronic SI joint pain.

Causes of Chronic Sacroiliac Joint Pain

Chronic SI joint pain can result from a variety of factors, including:

  1. Osteoarthritis: Degenerative changes in the SI joint can lead to cartilage breakdown, inflammation, and pain.
  2. Trauma: Injuries to the SI joint, such as fractures or ligament sprains, can cause long-term pain and dysfunction.
  3. Pregnancy: Hormonal changes and increased stress on the SI joint during pregnancy can lead to pain and instability.
  4. Inflammatory conditions: Autoimmune disorders, such as ankylosing spondylitis or rheumatoid arthritis, can cause inflammation and damage to the SI joint[2].
  5. Biomechanical abnormalities: Leg length discrepancies, altered gait patterns, or muscle imbalances can place excessive stress on the SI joint, leading to pain and dysfunction.

Identifying the underlying cause of your chronic SI joint pain is crucial for developing an effective treatment plan and managing your symptoms.

Symptoms of Chronic Sacroiliac Joint Pain

The symptoms of chronic sacral pain can vary from person to person, but common signs include:

  • Pain in the lower back, buttocks, or legs (usually on one side)
  • Aching, burning, or stabbing sensations in the SI joint area
  • Pain that worsens with prolonged sitting, standing, or walking
  • Stiffness or reduced range of motion in the lower back or hips
  • Muscle weakness or tenderness in the affected area
  • Pain that radiates down the leg, mimicking sciatica

These symptoms may fluctuate in intensity and can be exacerbated by certain movements or activities, such as climbing stairs or transitioning from sitting to standing.

Diagnosing Chronic Sacroiliac Joint Pain

Diagnosing chronic SI joint pain can be challenging, as the symptoms often mimic those of other conditions, such as herniated discs or hip disorders. Your healthcare provider may use a combination of the following methods to accurately diagnose your condition:

  1. Medical history: Your doctor will ask about your symptoms, their onset, and any factors that seem to aggravate or alleviate your pain.
  2. Physical examination: A thorough physical exam will assess your posture, gait, range of motion, and areas of tenderness or muscle weakness.
  3. Provocative tests: Specific maneuvers, such as the FABER test or Gaenslen’s test, can help identify SI joint dysfunction[3].
  4. Imaging studies: X-rays, CT scans, or MRIs may be ordered to visualize the SI joint and rule out other potential causes of your pain.
  5. Diagnostic injections: Injecting a local anesthetic into the SI joint can help confirm the diagnosis if your pain is significantly reduced following the injection.

An accurate diagnosis is essential for developing a targeted treatment plan that addresses your specific needs and goals.

Non-Surgical Treatment Options for Chronic SI Joint Pain

The initial treatment approach for chronic SI joint pain typically involves non-surgical interventions aimed at reducing pain, improving function, and promoting healing. These may include:

Physical Therapy

Physical therapy is a cornerstone of treatment for chronic SI joint pain. A skilled physical therapist can help you:

  • Improve posture and body mechanics
  • Strengthen the muscles surrounding the SI joint
  • Increase flexibility and range of motion
  • Learn proper exercise techniques to minimize stress on the SI joint

Engaging in a regular, targeted exercise program can help alleviate pain, improve stability, and prevent future exacerbations of your condition.


Several types of medications may be prescribed to help manage chronic SI joint pain:

Medication ClassExamplesPurpose
NSAIDsIbuprofen, NaproxenReduce inflammation and pain
Muscle relaxantsCyclobenzaprine, TizanidineAlleviate muscle spasms and tension
AntidepressantsDuloxetine, AmitriptylineModulate pain perception and improve sleep
AnticonvulsantsGabapentin, PregabalinReduce nerve-related pain and sensitization

Your healthcare provider will determine the most appropriate medication regimen based on your specific needs, medical history, and potential side effects.


Targeted injections can help alleviate chronic SI joint pain by reducing inflammation and irritation in the affected area. Common injections include:

  • Corticosteroid injections: These powerful anti-inflammatory medications can provide rapid pain relief and reduce joint inflammation.
  • Prolotherapy: This involves injecting an irritant solution into the SI joint to stimulate healing and strengthen the surrounding ligaments[4].
  • Platelet-rich plasma (PRP) injections: PRP injections use your own concentrated blood platelets to promote healing and reduce inflammation in the SI joint.

Injections can provide significant relief for some patients, but their effects may be temporary, and repeated injections may be necessary to maintain pain control.

Surgical Treatment Options for Chronic SI Joint Pain

When non-surgical treatments fail to provide adequate relief, or if the SI joint is severely damaged, surgical intervention may be considered. The most common surgical procedures for chronic SI joint pain include:

SI Joint Fusion

SI joint fusion is a minimally invasive procedure that involves inserting small implants across the SI joint to stabilize and fuse the joint, thereby reducing pain and improving function. This procedure has been shown to be effective for patients with severe SI joint dysfunction who have not responded to conservative treatments[5].

Radiofrequency Ablation

Radiofrequency ablation (RFA) is a minimally invasive procedure that uses heat generated by radio waves to destroy the sensory nerves responsible for transmitting pain signals from the SI joint. RFA can provide long-lasting pain relief for some patients with chronic SI joint pain.

Your healthcare provider will discuss the potential risks and benefits of surgical intervention, helping you make an informed decision about the best course of treatment for your individual needs.

Lifestyle Modifications for Managing Chronic SI Joint Pain

In addition to medical treatments, making certain lifestyle changes can help manage your symptoms and improve your overall quality of life:

  1. Maintain a healthy weight: Excess weight puts added stress on the SI joint, exacerbating pain and inflammation.
  2. Practice good posture: Keep your spine aligned and avoid slouching or sitting for prolonged periods.
  3. Use proper body mechanics: When lifting, bending, or twisting, use your legs and engage your core muscles to minimize stress on the SI joint.
  4. Sleep on a supportive mattress: A medium-firm mattress can help maintain proper spinal alignment and reduce SI joint stress during sleep.
  5. Manage stress: Chronic pain can be emotionally taxing, so find healthy ways to cope with stress, such as deep breathing, meditation, or gentle yoga.

Incorporating these lifestyle modifications into your daily routine can help you better manage your chronic SI joint pain and improve your overall well-being.

Coping with Chronic SI Pain

Living with chronic SI joint pain can be challenging, both physically and emotionally. In addition to seeking medical treatment, it’s essential to develop healthy coping strategies to manage the ongoing impact of your condition:

  1. Communicate openly with your healthcare team: Share your concerns, goals, and treatment preferences with your doctors and therapists to ensure a collaborative approach to your care.
  2. Join a support group: Connecting with others who understand your experience can provide valuable emotional support and practical advice for managing chronic pain.
  3. Engage in enjoyable activities: Prioritize hobbies and social interactions that bring you joy and help distract you from your pain.
  4. Practice relaxation techniques: Deep breathing, progressive muscle relaxation, and guided imagery can help reduce pain perception and promote a sense of calm.

Remember, everyone’s journey with chronic SI joint pain is unique, and what works for one person may not work for another. Be patient with yourself and don’t hesitate to seek support when needed.

Individuals with chronic SI joint pain may also experience symptoms similar to other chronic pain conditions, such as:

If you are experiencing chronic SI joint pain alongside other chronic pain symptoms, it is essential to discuss these concerns with your healthcare provider to ensure a comprehensive evaluation and appropriate treatment plan.

The Importance of Early Intervention

Early diagnosis and treatment of chronic SI joint pain are crucial for preventing long-term disability and improving patient outcomes. Delaying treatment can lead to further joint damage, muscle weakness, and central sensitization, making pain management more challenging.

If you suspect you may have SI joint dysfunction or are experiencing persistent lower back, buttock, or leg pain, consult with your healthcare provider as soon as possible to discuss your symptoms and develop an appropriate treatment plan.

Key Takeaways

  1. Chronic sacroiliac joint pain is a common and often debilitating condition that can significantly impact an individual’s quality of life.
  2. Various factors, including osteoarthritis, trauma, pregnancy, inflammatory conditions, and biomechanical abnormalities, can cause chronic SI joint pain.
  3. Diagnosing chronic SI joint pain may involve a combination of medical history, physical examination, provocative tests, imaging studies, and diagnostic injections.
  4. Non-surgical treatment options for chronic SI joint pain include physical therapy, medications, and targeted injections, while surgical interventions such as SI joint fusion or radiofrequency ablation may be considered in severe cases.
  5. Lifestyle modifications, including maintaining a healthy weight, practicing good posture, using proper body mechanics, and managing stress, can help manage symptoms and improve overall well-being.


Chronic sacroiliac joint pain is a complex condition that requires a multidisciplinary, individualized approach to diagnosis and treatment. By understanding the causes, symptoms, and available treatment options, patients can work closely with their healthcare team to develop an effective management plan and improve their quality of life.

Remember, if you are experiencing persistent lower back, buttock, or leg pain, don’t hesitate to seek medical attention and advocate for your health. With the right support, knowledge, and treatment strategies, it is possible to successfully manage chronic SI joint pain and lead a fulfilling, active life.


  1. Cohen, S. P., Chen, Y., & Neufeld, N. J. (2013). Sacroiliac joint pain: a comprehensive review of epidemiology, diagnosis and treatment. Expert Review of Neurotherapeutics, 13(1), 99-116. https://doi.org/10.1586/ern.12.148
  2. Barros, G., McGrath, L., & Gelfenbeyn, M. (2019). Sacroiliac joint dysfunction in patients with low back pain. Federal Practitioner, 36(8), 370-375. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6711289/
  3. Laslett, M., Aprill, C. N., McDonald, B., & Young, S. B. (2005). Diagnosis of sacroiliac joint pain: validity of individual provocation tests and composites of tests. Manual Therapy, 10(3), 207-218. https://doi.org/10.1016/j.math.2005.01.003
  4. Cusi, M., Saunders, J., Hungerford, B., Wisbey-Roth, T., Lucas, P., & Wilson, S. (2010). The use of prolotherapy in the sacroiliac joint. British Journal of Sports Medicine, 44(2), 100-104. https://doi.org/10.1136/bjsm.2007.042044
  5. Polly, D. W., Cher, D. J., Wine, K. D., Whang, P. G., Frank, C. J., Harvey, C. F., Lockstadt, H., Glaser, J. A., Limoni, R. P., & Sembrano, J. N. (2015). Randomized controlled trial of minimally invasive sacroiliac joint fusion using triangular titanium implants vs nonsurgical management for sacroiliac joint dysfunction: 12-month outcomes. Neurosurgery, 77(5), 674-691. https://doi.org/10.1227/NEU.0000000000000988
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