Acupuncture for Superior Cluneal Nerve Injury: Diagnosis & Treatment

Superior cluneal nerve injury is a clinically common pain syndrome of the upper buttock.

The superior gluteal nerve is the lateral cutaneous branch of the posterior rami of the 1st to 3rd lumbar nerves. It exits from the lateral border of the erector spinae muscle, pierces the thoracolumbar fascia together with the superior gluteal artery, and passes out of the pelvis through the suprapiriform foramen. It then courses between the gluteus medius and gluteus minimus muscles, giving off branches to the gluteus medius, gluteus minimus, and tensor fasciae latae. Its main actions are to tense the fascia lata, flex the hip joint, and contract to abduct the hip joint. It also innervates the sensory supply to the skin of the gluteal region.

The main cause of superior cluneal nerve injury is excessive stretching damage to the nerve when the body rotates sharply and forcefully from side to side. In the acute phase, this leads to aseptic inflammation, congestion, and swelling of the nerve. In the chronic phase, it results in hyperplasia of the tissues surrounding the nerve and fibrotic changes in the nerve itself.

Most patients present with abnormal iliac crest morphology. A high or everted iliac crest predisposes the superior cluneal nerves to injury. In those with chronic injury, the superior cluneal nerves become thickened, and a distinct “cord-like” structure can be palpated.

【Key Diagnostic Points】

Clinically, it often occurs in young and middle-aged males aged 20–40, predominantly on one side, with a history of strenuous exercise or sprain. In more severe cases of sprain, the pain is intense from the onset, and when bending…

The lower back experiences radiating pain, stabbing pain, distending pain, or tearing pain within the distribution area during mild twisting movements, activities, getting into bed, standing up, etc. Skin tension in the lumbosacral region increases, and compression or traction on the affected nerve aggravates the pain. Tenderness is evident at the point where the superior cluneal nerve crosses the iliac crest. The patient feels weakness in the lower back when standing up or sitting down, with no obvious nerve root irritation symptoms.

**Examination:** There is marked tenderness at the highest point of the posterior superior iliac spine (PSIS). A palpable cord-like structure is felt in the gluteal region inferior to the tender point. Pressure over this area intensifies the pain in the gluteal region and the iliac crest.

【Treatment】

1. Acupoints and Needling Techniques

1. **Yaoyi point (affected side)**: Located on the lower back, 3 cun lateral to the lower border of the spinous process of the 4th lumbar vertebra. Two filiform needles of gauge 30 and length 2.5 cun are selected. After routine local disinfection, the first needle is inserted obliquely downward toward the buttock to a depth of approximately 2.3 cun; the second needle is inserted perpendicularly along the angle of the posterior superior iliac spine to a depth of approximately 2.3 cun. Needle sensation: The first needle produces a radiating sensation toward the buttock and the upper popliteal region of the posterior thigh; the second needle causes local distension and pain in the lumbar area.

2. **Tunzhong (Mid-Buttock, affected side)**: Located in the lower buttock, 5 cun lateral to Yaoqi (Lumbus Extraordinary Point, 2 cun above the tip of the coccyx). Use a 30-gauge filiform needle of 3 cun (75mm) in length. After routine local disinfection, insert perpendicularly to a depth of about 2.8 cun. Needling sensation: local distension and pain, or radiation to the lower limbs.

3. BL40 (Weizhong) (affected side): Located at the midpoint of the popliteal crease, between the tendons of the biceps femoris and semitendinosus. Use a gauge 30, 2 cun filiform needle. Perform routine local disinfection, then insert perpendicularly to a depth of approximately 1.8 cun. Needle sensation: local distension and pain, or a sensation radiating to the lower leg and the sole of the foot.

II. Methods

The patient is placed in a prone position. The aforementioned acupoints are needled according to the standard method, with needles retained for 40 minutes. During retention, the needles are twisted once. After needle removal, cupping is applied for approximately 1 minute. Treatment is performed once daily, with 6 sessions comprising one course. A 5-day rest period is taken before the next course.

【Commentary】

For such patients in the acute phase, applying the above method yields good results, with most achieving essentially complete pain relief within 6 sessions. For chronic patients with a longer duration—those presenting with obvious protrusion at the iliac crest and larger cord-like structures in the buttock—the above method also has some effect, but it takes longer. In such cases, consider performing a prednisolone injection for trigger point block.

Diagnostic Features of Cluneal Nerve Entrapment

Superior cluneal nerve injury presents a distinct clinical picture characterized by upper buttock pain nerve injury. Patients typically report a dull ache or sharp, burning sensation localized to the upper gluteal region, often radiating laterally towards the iliac crest. Key cluneal nerve entrapment symptoms include tenderness upon palpation at the point where the nerve pierces the thoracolumbar fascia, approximately 7–8 cm from the midline. The pain may be exacerbated by prolonged sitting, hip extension, or lateral bending of the lumbar spine. Diagnosis relies on a combination of history, physical examination, and selective diagnostic nerve blocks. Imaging such as ultrasound can reveal nerve thickening or fascial thickening at the entrapment site, while MRI helps rule out lumbar pathology. Differentiating from sacroiliac joint dysfunction or lumbar radiculopathy is essential, as the pain distribution overlaps. The triad of localized tenderness, positive Tinel-like sign over the nerve’s exit point, and temporary relief with anesthetic injection confirms the diagnosis. Understanding these symptoms is crucial for clinicians to avoid mislabeling the condition as nonspecific low back pain and to initiate appropriate superior cluneal nerve injury treatment strategies early.

Anatomical Basis and Pathophysiology of Injury

The superior cluneal nerve, derived from the lateral cutaneous branches of the posterior rami of the L1–L3 spinal nerves, emerges through the thoracolumbar fascia alongside the superior gluteal artery. It then courses between the gluteus medius and gluteus minimus before supplying the upper buttock skin. Entrapment commonly occurs at the fascial opening, where repetitive microtrauma from lumbar hyperextension or prolonged sitting causes fibrosis and compression. This leads to ischemic neuropathy and localized inflammation. The resulting upper buttock pain nerve injury is often referred from the entrapped nerve, creating a myofascial pain syndrome that mimics other gluteal pathologies. The intimate relationship with the erector spinae muscle and thoracolumbar fascia means that postural dysfunctions—such as excessive lumbar lordosis or hip flexor tightness—increase tension on the fascia, exacerbating compression. Understanding this anatomy is essential for effective superior cluneal nerve injury treatment because interventions must address both the neural compression and the underlying biomechanical contributors. Without addressing the fascial tension and muscle imbalances, the condition may become chronic, leading to persistent cluneal nerve entrapment symptoms that resist conventional therapies.

Acupuncture as a Targeted Treatment Modality

Acupuncture offers a minimally invasive, evidence-based approach for superior cluneal nerve injury treatment. By targeting trigger points and fascial constrictions along the nerve’s course, acupuncture needles can mechanically release the thoracolumbar fascia, reduce local fibrosis, and improve microcirculation. Needles placed at the nerve’s entrapment site—typically deep to the erector spinae and gluteus medius—induce a local twitch response that relaxes the hypertonic muscles and releases entrapped fascial bands. This addresses the root of cluneal nerve entrapment symptoms, such as localized tenderness and referred pain. Additionally, systemic effects including opioid peptide release and modulation of central pain pathways help decrease the intensity of upper buttock pain nerve injury. Electrostimulation may be added to enhance nerve regeneration and reduce neurogenic inflammation. Acupuncture should be combined with postural training, stretching of the hip flexors and lumbar extensors, and manual therapy to prevent recurrence. Clinical studies report significant reduction in pain scores and improved functional outcomes after 6–10 sessions. Given its low risk profile, acupuncture represents a valuable option for patients who have not responded to conservative measures or who wish to avoid corticosteroid injections or surgical neurolysis. Further research is warranted to standardize treatment protocols and confirm long-term efficacy.