Sciatica — Pain Radiating from the Buttock Down the Leg
Table of Contents
Overview of sciatica
The sciatic nerve is the longest and thickest peripheral nerve in the body, formed by the L4–S3 nerve roots. When this nerve is irritated, sciatica develops with pain radiating from the buttock down the back of the thigh, the lateral calf, and into the sole of the foot. In Korean medicine, this is classified within bi-syndrome (痺證), interpreted as wind-cold-damp invading the meridians or blood stasis blocking the meridians.
Identifying the cause is essential
- Disc herniation: The most common cause, in which an L4-5 or L5-S1 disc directly compresses the nerve root. Pain typically worsens with coughing or sneezing.
- Piriformis syndrome: The piriformis muscle becomes hypertrophied or tight and compresses the sciatic nerve passing beneath it. This should be suspected when imaging shows no disc abnormality but sciatica symptoms persist.
- Spondylolisthesis: An upper vertebral body slips forward over a lower one, narrowing the neural foramen and compressing the nerve.
- Sacroiliac joint dysfunction: Inflammation of the sacroiliac joint of the pelvis can also irritate the adjacent sciatic nerve.
Korean medicine treatment protocol
Because the treatment strategy for sciatica differs by cause, accurate differentiation is followed by tailored treatment.
- Electroacupuncture (電鍼): Electrical stimulation is delivered through acupoints along the sciatic nerve pathway, including Huantiao (環跳, GB30), Fengshi (風市, GB31), Yanglingquan (陽陵泉, GB34), and Xuanzhong (懸鍾, GB39), normalizing nerve conduction and raising the pain threshold. Mixed 2–100 Hz frequencies stimulate both endorphin and enkephalin release.
- Deep needling at Huantiao (環跳穴): Deep needling at Huantiao, located where the sciatic nerve emerges below the piriformis, releases perineural adhesions and improves blood flow.
- Chuna manipulation: Pelvic correction and piriformis release techniques are applied to resolve the structural causes of nerve compression.
- Herbal medicine: Dokhwalgisaeng-tang is prescribed for wind-cold-damp patterns, and Sopung-hwalhyeol-tang (疏風活血湯) for blood-stasis patterns, based on differential diagnosis.
Course and prognosis
Most cases of sciatica improve within 4–8 weeks with conservative Korean medicine treatment. When piriformis syndrome is the cause, combining stretching with treatment leads to faster recovery. Rapidly progressive muscle weakness or accompanying bowel/bladder dysfunction requires immediate detailed examination.