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Understanding Sacroiliac Joint Pain: Causes and Treatments

June 14, 2024

Understanding sacroiliac joint pain: causes and treatments is essential for those experiencing discomfort in this critical part of the body. The sacroiliac (SI) joints are located at the base of the spine, where the sacrum meets the iliac bones of the pelvis. These joints play a vital role in providing stability and absorbing shock during activities such as walking and lifting. When the SI joints become irritated or inflamed, they can cause significant pain and limit mobility. This blog post will explore the causes, symptoms, and treatments for sacroiliac joint pain.

What is Sacroiliac Joint Pain?

Sacroiliac joint pain, often referred to as SI joint dysfunction or sacroiliitis, occurs when there is inflammation or dysfunction in one or both of the sacroiliac joints. This pain can be felt in the lower back, buttocks, hips, or even radiate down the legs, often resembling sciatica.

Causes of Sacroiliac Joint Pain

Understanding sacroiliac joint pain requires an examination of the various factors that can contribute to this condition. Common causes include:

1. Trauma

Injury to the SI joint, such as from a fall, car accident, or sports injury, can lead to inflammation and pain. The force of the impact can disrupt the normal function of the SI joint, resulting in discomfort.

2. Arthritis

Arthritis, particularly osteoarthritis and ankylosing spondylitis, can cause degeneration of the cartilage in the SI joints, leading to pain and stiffness. This is more common in older adults but can affect individuals of any age.

3. Pregnancy

During pregnancy, the body releases hormones that loosen the ligaments in the pelvis to prepare for childbirth. This increased mobility can stress the SI joints, causing pain. Additionally, the added weight and altered gait during pregnancy can exacerbate SI joint discomfort.

4. Overuse

Repetitive activities that place stress on the SI joints, such as heavy lifting, running, or even prolonged sitting, can lead to inflammation and pain. Overuse injuries are common in athletes and individuals with physically demanding jobs.

5. Structural Abnormalities

Structural issues, such as leg length discrepancies, scoliosis, or hip problems, can alter the alignment and function of the SI joints, leading to pain. These abnormalities can cause uneven distribution of weight and stress on the joints.

Symptoms of Sacroiliac Joint Pain

Recognizing the symptoms of sacroiliac joint pain is crucial for proper diagnosis and treatment. Common symptoms include:

Lower Back Pain: Pain in the lower back is a hallmark symptom of SI joint dysfunction. This pain is often localized to one side of the lower back but can be bilateral.

Buttock Pain: Pain may radiate to the buttocks, making it difficult to sit or lie down comfortably.

Hip Pain: Discomfort can extend to the hips, affecting mobility and gait.

Leg Pain: Pain may radiate down one or both legs, resembling sciatica. This can cause numbness, tingling, or weakness in the legs.

Stiffness and Limited Mobility: Stiffness in the lower back, hips, and buttocks can limit range of motion and make daily activities challenging.

Pain with Movement: Activities that involve bending, lifting, or twisting can exacerbate SI joint pain.

Diagnosing Sacroiliac Joint Pain

Diagnosing sacroiliac joint pain involves a combination of physical examinations, medical history, and imaging tests. Healthcare providers may use the following methods:

1. Physical Examination

During a physical exam, the healthcare provider will assess the range of motion, palpate the SI joints for tenderness, and perform specific tests, such as the FABER (Flexion, Abduction, and External Rotation) test, to identify pain sources.

2. Medical History

A thorough medical history helps identify potential causes of SI joint pain, such as recent injuries, arthritis, or repetitive activities. Understanding the patient’s symptoms and lifestyle factors is crucial for accurate diagnosis.

3. Imaging Tests

Imaging tests, such as X-rays, MRI, or CT scans, can provide detailed views of the SI joints and surrounding structures. These tests help rule out other conditions, such as herniated discs or hip problems, that may mimic SI joint pain.

4. Diagnostic Injections

A diagnostic injection involves injecting a local anesthetic into the SI joint. If the pain is temporarily relieved, it confirms that the SI joint is the pain source. This test is often used to guide treatment decisions.

Treatments for Sacroiliac Joint Pain

Understanding sacroiliac joint pain: causes and treatments is crucial for developing an effective pain management plan. Various treatment options are available, ranging from conservative therapies to more advanced interventions.

1. Physical Therapy

Physical therapy is a cornerstone of SI joint pain treatment. A physical therapist can design a personalized exercise program to strengthen the muscles supporting the SI joints, improve flexibility, and reduce pain. Key components of physical therapy include:

Strengthening Exercises: Focus on strengthening the core, hip, and lower back muscles to provide better support and stability for the SI joints.

Stretching: Gentle stretching exercises can improve flexibility and reduce stiffness in the lower back, hips, and buttocks.

Manual Therapy: Techniques such as massage and joint mobilization can relieve pain and improve range of motion.

2. Medications

Over-the-counter and prescription medications can help manage SI joint pain. Common options include:

Nonsteroidal Anti-Inflammatory Drugs (NSAIDs): NSAIDs, such as ibuprofen and naproxen, reduce inflammation and alleviate pain.

Pain Relievers: Acetaminophen can help manage mild to moderate pain.

Muscle Relaxants: These medications can reduce muscle spasms associated with SI joint dysfunction.

3. Injections

Injections can provide targeted pain relief for SI joint pain. Common injection therapies include:

Corticosteroid Injections: These injections deliver powerful anti-inflammatory medication directly into the SI joint, reducing inflammation and pain.

Prolotherapy: This treatment involves injecting a solution that stimulates the body’s natural healing response, promoting the repair of damaged tissues.

Platelet-Rich Plasma (PRP) Therapy: PRP injections use the patient’s blood, processed to concentrate platelets, to promote healing and reduce inflammation in the SI joint.

4. Radiofrequency Ablation (RFA)

RFA is a minimally invasive procedure that uses radiofrequency energy to heat and destroy the nerve fibers responsible for transmitting pain signals from the SI joint. This treatment can provide long-lasting pain relief for individuals with chronic SI joint pain.

5. Surgical Interventions

In severe cases where conservative treatments fail, surgical options may be considered. Common surgical interventions include:

SI Joint Fusion: This procedure involves fusing the SI joint to eliminate movement and reduce pain. It is typically reserved for cases where other treatments have not been successful.

Minimally Invasive Surgery: Minimally invasive techniques, such as arthroscopy, can address specific issues within the SI joint with smaller incisions and shorter recovery times.

Lifestyle Modifications for Managing SI Joint Pain

In addition to medical treatments, lifestyle modifications can play a significant role in managing sacroiliac joint pain. Here are some tips to help reduce pain and improve quality of life:

Maintain a Healthy Weight: Excess weight can place additional stress on the SI joints. Maintaining a healthy weight through a balanced diet and regular exercise can alleviate pain.

Practice Good Posture: Proper posture can reduce strain on the SI joints. Ensure that you sit, stand, and lift objects correctly to avoid unnecessary stress.

Use Ergonomic Supports: Invest in ergonomic furniture and supports, such as lumbar cushions and supportive mattresses, to reduce discomfort and promote proper alignment.

Stay Active: Regular physical activity can strengthen muscles, improve flexibility, and reduce pain. Choose low-impact exercises that are gentle on the joints.


Understanding sacroiliac joint pain: causes and treatments is essential for those experiencing discomfort in this area. By recognizing the symptoms, identifying the causes, and exploring various treatment options, individuals can find effective ways to manage their pain and improve their quality of life. Whether through physical therapy, medications, injections, or lifestyle modifications, there are numerous strategies available to help alleviate sacroiliac joint pain and restore mobility. If you are experiencing persistent SI joint pain, consult with a healthcare provider to develop a personalized treatment plan tailored to your needs.

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