What Is the Sacroiliac (SI) Joint and Why Does It Hurt?

The sacroiliac (SI) joint is an important part of your lower back and pelvis, yet many people have never heard of it until they begin experiencing pain. SI joint dysfunction is a common cause of lower back, buttock, hip, and upper leg pain, and it is often mistaken for sciatica, hip problems, or other spinal conditions. Understanding the role of the SI joint and why it becomes painful can help you seek the right treatment and find lasting relief.

At Pain Treatment Institute, we help patients throughout McKinney identify the source of their pain and develop personalized treatment plans designed to improve mobility and restore quality of life.

What Is the Sacroiliac (SI) Joint?

The sacroiliac joints are located where the sacrum, the triangular bone at the base of the spine, connects to the pelvic bones. You have one SI joint on each side of your pelvis. These joints play a vital role in transferring weight from your upper body to your legs while providing stability during standing, walking, bending, and other daily activities.

Although the SI joints have only a small amount of movement, even minor irritation or inflammation can cause significant pain and limit your ability to move comfortably.

What Causes SI Joint Pain?

Several different conditions can contribute to SI joint dysfunction. Some of the most common causes include:

Arthritis

Osteoarthritis and inflammatory forms of arthritis can gradually damage the SI joint, leading to inflammation, stiffness, and chronic pain. Patients experiencing arthritis in multiple joints may also benefit from learning more about our arthritis pain treatment in McKinney.

Injury or Trauma

Falls, motor vehicle accidents, sports injuries, or sudden twisting movements can damage the ligaments that support the SI joint, resulting in pain and instability.

Pregnancy

Hormonal changes during pregnancy loosen the ligaments surrounding the pelvis, while additional body weight places greater stress on the SI joints. These changes can contribute to SI joint pain both during and after pregnancy.

Repetitive Stress

Jobs or activities that require repetitive lifting, bending, twisting, or prolonged standing may gradually place excessive stress on the SI joints, leading to chronic irritation.

Degenerative Changes

As the body ages, normal wear and tear can affect the SI joints and surrounding structures, increasing the risk of chronic pain and reduced mobility.

Common Symptoms of SI Joint Pain

SI joint pain can vary from person to person but often includes:

  • Pain in the lower back or buttocks
  • Pain that radiates into the hips or upper legs
  • Discomfort when standing, walking, or climbing stairs
  • Pain after prolonged sitting
  • Stiffness in the lower back or pelvis
  • A feeling of instability when walking

Because SI joint pain frequently radiates into the hips and legs, it is often confused with other conditions. Patients experiencing pain in these areas may also benefit from learning more about our hip pain treatment in McKinney or leg pain treatment in McKinney services.

How Is SI Joint Pain Diagnosed?

Diagnosing SI joint dysfunction begins with a comprehensive medical evaluation. Your provider will review your symptoms, medical history, and perform a physical examination. Diagnostic imaging and image-guided SI joint injections may also be recommended to confirm that the sacroiliac joint is the source of your pain.

Treatment Options for SI Joint Pain

Treatment depends on the underlying cause and severity of your symptoms. Many patients experience significant improvement with medication management, physical therapy, activity modifications, image-guided SI joint injections, nerve blocks, or radiofrequency ablation. Every treatment plan is customized to address each patient’s specific diagnosis and goals.

If you’re experiencing persistent lower back, hip, or buttock pain, our personalized sacroiliac joint pain treatment in McKinney is designed to identify the source of your discomfort and help you achieve long-term relief.

Find Lasting Relief from SI Joint Pain

Living with SI joint pain can make everyday activities uncomfortable, but effective treatment is available. With an accurate diagnosis and a personalized care plan, many patients experience significant improvements in pain, mobility, and overall quality of life.

To learn more about your treatment options or request an appointment, visit our Contact Us page. Pain Treatment Institute proudly serves patients throughout McKinney and the surrounding communities.