What is psoas syndrome?

Psoas syndrome is an uncommon and therefore often misdiagnosed condition that can present as refractory lower back pain accompanied by other symptoms. The condition occurs when the psoas muscle, the long muscle (up to 16 inches), is injured. The psoas muscle is located in the lower lumbar region of the spine and extends through the pelvis to the femur. The psoas muscle’s job is to flex the hip joint and lift the upper leg towards the body, as in walking.

Who gets psoas syndrome?

Anyone can get psoas syndrome, but athletes, runners, and those engaged in plyometric jumping exercises are at higher risk for the condition, due to the nature of their activities.

What causes psoas syndrome?

Psoas syndrome may have no identifiable cause. Care should be taken in people who are immune-compromised (due to transplant, cancer, or infectious causes) to ensure that there is no infectious cause or associated myositis in the psoas muscle that presents in a related fashion.

What are the symptoms of psoas syndrome?

Psoas syndrome can cause a variety of symptoms, including:

  • Lower back pain, the most common symptom, although this can be symptomatic of many conditions
  • Pain in the lumbosacral region (the border between the lower part of the spine and the buttocks that can radiate up to lumbar vertebrae or down to the sacrum) when sitting or particularly when changing positions arising for sitting to standing
  • Difficulty/pain when trying to stand in a fully erect posture
  • Pain in the buttocks
  • Radiation of pain down the leg
  • Groin pain
  • Pelvic pain
  • Limping or shuffling stride when you walk

Many of these symptoms can mimic other, more serious conditions. Hip arthritis, kidney stones (ureteral calculi), hernias, femoral bursitis, prostatitis, salpingitis, colon cancer, and colon diverticulitis can also cause severe back pain. It is important to consult your doctor if you have any of the above.