Pain is the body’s way of signaling that something is amiss. However, identifying the root cause of pain can be a complex puzzle, especially when multiple conditions share similar symptoms. This blog aims to demystify four common sources of pain: sciatica, sacroiliac joint pain, facet joint pain, and piriformis syndrome. By comparing these conditions based on the type of pain, radiation pattern, symptoms, and clinical examination findings, we’ll help you differentiate between them and guide you towards seeking appropriate medical attention.

Type of Pain

Sciatica : refers to pain that originates in the lower back and radiates down the buttock and leg. It is caused by compression or irritation of the sciatic nerve, often due to a herniated disc or spinal stenosis. The pain is typically sharp, shooting, and can be accompanied by tingling or numbness.

Sacroiliac Joint Pain : Pain arising from the sacroiliac joint, which connects the sacrum to the ilium, is often felt in the lower back, buttock, and sometimes down the back of the thigh. The pain is typically described as a dull ache or aching sensation.

Facet Joint Pain : Facet joints, located on the back of the spine, can cause pain that’s often localized to the lower back region. The pain is usually described as a deep, nagging ache that can worsen with certain movements or activities.

Piriformis Syndrome : This condition involves the piriformis muscle in the buttock region irritating or compressing the sciatic nerve. Pain is felt in the buttock and may radiate down the leg. The pain is often described as deep and achy, occasionally accompanied by tingling.

Radiation Pattern of Pain

Sciatica : The hallmark of sciatica is pain radiating along the sciatic nerve pathway, often extending from the lower back to the buttock, thigh, calf, and even the foot. The radiation pattern follows the nerve’s distribution.

Sacroiliac Joint Pain : Pain from the sacroiliac joint may radiate down the back of the thigh or even into the groin. However, it rarely extends below the knee and typically stays above it.

Facet Joint Pain : Facet joint pain usually remains localized to the lower back. It does not typically radiate down the leg, although it might refer pain to the buttock.

Piriformis Syndrome : Piriformis syndrome pain can radiate from the buttock along the path of the sciatic nerve, causing pain down the back of the thigh and sometimes into the calf.


Sciatica : In addition to pain and discomfort, sciatica may cause numbness, tingling, and weakness in the leg and foot. It’s often exacerbated by activities like sitting or coughing.

Sacroiliac Joint Pain : Pain from the sacroiliac joint might worsen with prolonged standing or walking. Some patients may experience a feeling of instability in the lower back.

Facet Joint Pain : Facet joint pain may be aggravated by backward bending or twisting motions. Stiffness and muscle spasms in the lower back are also common.

Piriformis Syndrome : In piriformis syndrome, sitting for extended periods, climbing stairs, or running can exacerbate pain. Muscle tightness and discomfort in the buttock area are also common.

Relevant Clinical Examination for Each Condition Eliciting Positive Signs

Sciatica : Clinical tests such as the straight leg raise and slump test aim to reproduce sciatic nerve symptoms. Positive signs include pain, tingling, or numbness radiating down the leg during these tests.

Sacroiliac Joint Pain : The FABER (flexion, abduction, external rotation) test and the sacral thrust test can elicit sacroiliac joint pain. Pain during these maneuvers suggests sacroiliac joint involvement.

Facet Joint Pain : Reproducing pain during lumbar extension or rotation maneuvers can indicate facet joint involvement. The lumbar facet joint injection, guided by imaging, can help diagnose facet joint pain.

Piriformis Syndrome : The Freiberg test and the piriformis stretch test can provoke pain in piriformis syndrome. A positive result is an increase in buttock pain during these tests.


Navigating the maze of pain conditions requires a comprehensive understanding of their distinct characteristics. By comparing sciatica, sacroiliac joint pain, facet joint pain, and piriformis syndrome in terms of pain type, radiation pattern, symptoms, and clinical examination findings, we’ve provided a roadmap to help you identify and differentiate between these conditions. If you’re experiencing persistent pain or discomfort, consulting a medical professional is essential for an accurate diagnosis and tailored treatment plan.

AT ALLEVIATE,our specialists go through a thorough process of clinical and radiological assessment of the patient to come to the appropriate diagnosis.

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