What is Piriformis Syndrome? Hidden Causes of Buttock and Leg Numbness and Gangbuk Korean Medicine Approach

강북안정한의원Updated: 8/24/2026

Author: Director Lee Moon-young (Chief Director of Gangbuk Anjeong Korean Medicine Clinic) This content has been prepared in compliance with relevant laws including the Medical Law.


Have you ever experienced a tightness deep in your buttock and numbness extending to your leg when sitting for a long time? Many people assume it is a back problem and seek only lumbar treatment, but the symptoms do not improve and they come in. One cause that is easy to miss in these cases is Piriformis Syndrome.

📌 Key Summary

  1. Piriformis syndrome is a condition where the buttock muscle (piriformis) becomes tense or goes into spasm, compressing the sciatic nerve and causing pain and numbness in the buttock and leg.
  2. Although symptoms are similar to lumbar disc herniation, the underlying structural cause is different, so accurate differential diagnosis determines the direction of treatment.
  3. Early identification and consistent management help with return to daily life, so if symptoms persist, professional consultation is recommended.

What is Piriformis Syndrome? — Sciatic Nerve Compression Condition Starting from Deep in the Buttock

The piriformis muscle (梨狀筋, piriformis muscle) is a small muscle located deep in the pelvis that is responsible for external rotation of the hip joint. The sciatic nerve passes just below or through this muscle. According to MSD Manuals resources, when the piriformis becomes cramped or excessively tense, the sciatic nerve is compressed and pain and numbness can spread from the buttock to the thigh, calf, and sole of the foot.

According to PubMed clinical research (PMC4190119), piriformis syndrome is classified as an extaspinal cause of sciatica, and cases where diagnosis is missed or delayed due to symptoms being similar to lumbar intervertebral disc herniation (lumbar disc herniation) are not uncommon. If there are persistent pain and numbness in the buttock and leg despite no abnormal findings on lumbar MRI, it is necessary to also consider the possibility of piriformis syndrome.

The important point is that lumbar disc herniation and piriformis syndrome have different underlying structural causes, so the treatment approach also differs. It is difficult to distinguish between the two conditions based on self-diagnosis alone, and differential diagnosis through professional consultation must be conducted first.

This content is provided for informational purposes, and specific diagnosis and treatment should be discussed with medical professionals.


Piriformis Syndrome: Causes, Symptoms, Diagnosis — How Does It Differ from Lumbar Disc Herniation?

Main Causes

According to Health Kyunghyang (2023.05) reports, piriformis syndrome can develop from various factors.

✓ Prolonged sitting posture (office workers, drivers, etc.) ✓ Habit of crossing legs ✓ Habit of carrying wallet in back pocket while sitting (causing pelvic twist) ✓ Muscle damage after trauma such as falls or traffic accidents ✓ Excessive exercise or sudden physical activity ✓ Muscle imbalance around the hip joint and chronic tension

Comparison of Lumbar Disc Herniation and Piriformis Syndrome

CategoryPiriformis SyndromeLumbar Disc Herniation
Primary pain onset locationDeep in buttock (gluteal region)Lower back (lumbar region)
Presence of back painOften absent or minimalBack pain is main symptom
Aggravating postureWhile sitting, crossing legsBending forward, coughing, sneezing
Radiating pain patternButtock→thigh→legLower back→buttock→leg
Structural causeSciatic nerve compression due to piriformis tension or spasmNerve root compression due to disc protrusion

According to clinical data, symptoms of piriformis syndrome start with buttock pain and radiate to the thigh, leg, and sole of the foot, with a tendency to worsen when getting up after sitting for a long time. In contrast, symptoms often improve somewhat with rest while lying down.

How is Diagnosis Performed?

According to PubMed clinical research (PMID: 19466717), piriformis syndrome often undergoes exclusion diagnosis due to overlapping symptoms with lumbar nerve root pathology. Clinically, physical examination tests that stimulate the piriformis (Pace test, Freiberg test, etc.) are used together with MRI and ultrasound imaging as auxiliary tools to rule out other causative diseases. For accurate diagnosis, it is important to comprehensively examine the pattern of symptoms, lifestyle habits, and physical examination findings.


Gangbuk Anjeong Korean Medicine Clinic's Piriformis Syndrome Approach — Integrated Management with Acupuncture, Bee Venom Acupuncture, and Chuna Therapy

Piriformis syndrome involves a complex interplay of muscle tension and nerve compression, so an integrated approach applying multiple methods together can be more helpful than single-method treatment. PubMed clinical review (PMC11531089) also presents conservative treatment (physical therapy, manual therapy, etc.) as the first-line treatment principle for piriformis syndrome, and this is commonly attempted before invasive procedures.

In Korean medicine, we approach this on the continuum of such conservative management in the following integrated manner.

Acupuncture: Acupuncture is applied to acupoints and ashi points (tender points) around the piriformis to facilitate muscle tension relief and qi and blood circulation. ✓ High-concentration bee venom acupuncture: According to relevant clinical data, bee venom components can be utilized in suppressing local inflammatory responses, and the absence of steroid components can reduce concerns about tolerance with repeated procedures. ✓ Chuna therapy: We examine the alignment of the hip joint and overall spine, and approach recovery of the twisted pelvic structure. ✓ Herbal medicine prescription: Herbal medicine is prescribed according to individual constitution and symptoms to strengthen surrounding muscles and ligaments and help resolve blood stasis. ✓ Cupping and moxibustion: These are used as auxiliary methods to facilitate deep muscle blood circulation and relieve pain from cold and dampness.

Gangbuk Anjeong Korean Medicine Clinic addresses tension relief of tissues around the piriformis and recovery of hip joint alignment through skilled chuna therapy and high-concentration bee venom acupuncture. We approach with careful monitoring of progress through customized prescriptions on a weekly basis.

The treatment effect and time required may vary depending on individual symptom severity, lifestyle habits, and constitution, and it is important to establish an individualized management plan after accurate assessment of the condition.


These Are the Types Who Benefit — Self-Check Points and Regional Guide

If any of the following items apply to you, it may be helpful to examine symptoms related to piriformis syndrome. However, self-check is only for reference purposes, and professional consultation for confirmation is essential.

📋 Self-Check Checklist

✓ Deep in the buttock becomes tight or painful when sitting for a long time ✓ Pain spreads from one buttock toward the leg when getting up from sitting ✓ Buttock pain worsens when climbing or descending stairs ✓ Discomfort is felt when crossing legs or sitting cross-legged ✓ Lumbar MRI was said to show no abnormalities, but legs continue to feel numb ✓ Habit of carrying wallet in back pocket and sitting for long periods ✓ One side of pelvic or buttock area is particularly painful when pressed

According to MSD Manuals resources, hip joint stretching can help with prevention and management of piriformis syndrome. However, if symptoms are already advanced, forceful stretching can actually become a source of irritation, so it is safer to proceed under professional guidance.

If you are concerned about piriformis symptoms in Suyu Station area or are seeking buttock pain management near Dobong or Gangbuk sciatic nerve pain Korean medicine care, Gangbuk Anjeong Korean Medicine Clinic can help you. In addition to areas near Suyu Station, patients also visit from nearby areas such as Dobong, Nowon, and Seongbuk.


Feel Free to Consult — We Will Help You at Gangbuk Anjeong Korean Medicine Clinic

Many people with piriformis syndrome spend a long time without finding the cause because symptoms are similar to lumbar disc herniation. However, clinical data consistently shows that early accurate identification and consistent management help with return to daily life.

Gangbuk Anjeong Korean Medicine Clinic is located near Exit 3 of Suyu Station, and you can conveniently visit with Naver reservation from 8 AM on all weekdays, weekends, and holidays. Feel free to consult with us. We will help you.

Here is convenient information for your reference when visiting.

Naver Reservation: Convenient reservation confirmation at your desired time without phone calls ✓ Clinical hours from 8 AM every day of the year: Possible to visit early in the morning before commute or work ✓ No parking worries: Free use of large parking lot in nearby Garden Tower (Dobong-ro 328) ✓ Private treatment space: Each bed is in an independent private-room style so you can receive treatment without worrying about others' gaze ✓ Elevator equipped: Those with mobility challenges can also visit comfortably

If buttock and leg numbness repeat, please don't worry alone and feel free to visit.


Frequently Asked Questions

Q1. How is piriformis syndrome different from lumbar disc herniation?

Lumbar disc herniation occurs when a disc between vertebrae protrudes and compresses a nerve, while piriformis syndrome occurs when the buttock muscle (piriformis) becomes tense or goes into spasm and compresses the sciatic nerve. If back pain is not prominent but buttock and leg numbness are the main symptoms, it is necessary to also consider the possibility of piriformis syndrome. Accurate differentiation is recommended through professional consultation.

Q2. Why does piriformis syndrome develop?

Main causes include prolonged sitting posture, habit of crossing legs, pelvic twist from wallet in back pocket, muscle damage after falls or traffic accidents, and strenuous exercise. It is particularly likely to occur in office workers who sit for long periods or those who drive frequently. Lifestyle habit modification becomes an important part of management.

Q3. How is piriformis syndrome diagnosed?

Piriformis syndrome often undergoes exclusion diagnosis because symptoms overlap with other conditions. Physical examination tests such as Pace test and Freiberg test are used to stimulate the piriformis and confirm symptom reproduction, and if necessary, MRI and ultrasound imaging are used as auxiliary tools to rule out other causes such as lumbar disc herniation. It is important to also examine the symptom pattern and lifestyle habits.

Q4. Can piriformis syndrome be managed with Korean medicine treatment?

Korean medicine uses acupuncture, high-concentration bee venom acupuncture, chuna therapy, and herbal medicine in an integrated manner, aiming at tension relief of the piriformis and recovery of hip joint alignment. Treatment effects and duration may vary depending on symptom severity and individual constitution, so it is important to develop an individual plan after accurate assessment of the condition. Feel free to consult at Gangbuk Anjeong Korean Medicine Clinic.

Q5. Are there piriformis stretches that can be done at home?

A modified "pigeon pose stretch" where you lie on your back, bend one knee, place it over the opposite leg, and pull toward your chest may help with piriformis relaxation. However, if symptoms are severe or pain worsens, stop immediately, and since forceful movements can actually become a source of irritation, it is recommended to proceed under professional guidance.


This content is provided for informational purposes, and specific diagnosis and treatment should be discussed with medical professionals.

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