Introduction: Does a Herniated Disc Really Require Surgery?
Approximately 60–80% of patients diagnosed with a herniated lumbar disc experience symptom improvement within 6–12 weeks (Kögl et al., 2024). Many people worry about surgery first, but most return to their daily lives with conservative treatment alone. The key questions are "how long conservative treatment should continue" and "what signs indicate that surgery should be considered."
Herniated lumbar discs are also very common in South Korea. According to a Korean study analyzing data from the National Health Insurance Service (NHIS) (Jung et al., 2020), approximately 470,000–540,000 people received medical care for herniated lumbar discs each year between 2008 and 2016, and the proportion of patients aged 60 or older increased from 36.0% in 2008 to 41.6% in 2016. In other words, the patient population is changing as the older population grows, so the decision points between conservative treatment, procedures, and surgery should be tailored to each patient.
What Is a Herniated Disc? Understanding Its Structure and Causes
Normal Structure and Function of the Intervertebral Disc
Between the vertebrae are cushions called intervertebral discs. Each intervertebral disc consists of a central nucleus pulposus surrounded by the annulus fibrosus. The nucleus pulposus is a soft, jelly-like tissue that absorbs shock, while the annulus fibrosus protects it by enclosing it in multiple layers of tough fibers.
How Disc Herniation Occurs
Disc herniation occurs when the annulus fibrosus tears and the nucleus pulposus escapes through it. If the nucleus pulposus passes through the annulus fibrosus and compresses a nerve root or the spinal cord, it may cause pain and neurological symptoms (Zhang et al., 2023). The herniated disc material not only causes physical compression but also triggers an inflammatory response, worsening the symptoms.
Causes in Everyday Life
Herniated discs are more often caused by repetitive stress than by a single major injury. Common risk factors include lifting heavy objects with poor posture, sitting for long periods at work, and sudden twisting movements.
As people age, intervertebral discs also lose water and elasticity, which is another important cause. Degenerative changes that begin in the late twenties weaken the annulus fibrosus, making it susceptible to tearing even from minor impacts.
Symptoms of a Herniated Disc — Which Warning Signs Should You Not Ignore?
Early Symptoms: Lower Back Pain and Stiffness
In the early stages of disc herniation, localized pain usually occurs in the lower back. It is common to feel stiff when getting up in the morning or to experience worsening pain when standing up after sitting for a long time. Sharp lower back pain when coughing or sneezing is also a characteristic sign of a herniated disc.
Radiating Pain Caused by Nerve Compression
When a herniated disc compresses a nerve root, radiating pain develops from the buttock down the leg. This is commonly called sciatica and may be accompanied by electric shock-like tingling or burning pain. An L4-5 disc herniation often causes symptoms along the outer calf and toward the big toe, while an L5-S1 herniation often causes symptoms along the back of the calf and the outer side of the foot.
Symptoms That Require Immediate Medical Attention
Most herniated discs improve over time, but some situations require emergency treatment. Kögl et al. emphasize that cauda equina syndrome accompanied by bladder or bowel dysfunction requires emergency decompression within 24–48 hours (Kögl et al., 2024).
Surgery should also be considered within three days if severe muscle weakness develops in the leg (MRC grade 3/5 or lower). If you cannot lift your ankle or stand on your toes, nerve damage may be progressing, so it is safer to seek an immediate evaluation.
Herniated Disc Diagnosis — How Do Clinicians Confirm It?
Medical History and Neurological Examination
First, clinicians ask about the location and nature of the pain and what makes it worse. Questions such as “Does it hurt more when you bend or straighten your back?” help distinguish disc problems from facet joint problems. They use the straight leg raise (SLR) test to check for nerve root irritation and assess muscle strength, sensation, and reflexes to identify which nerve may be compressed.
The Role of MRI and CT Imaging
MRI most accurately shows the location and extent of disc herniation. Its excellent soft-tissue contrast makes it well suited for assessing the degree of nerve compression. However, Zhang et al. emphasize that diagnosis should be based on both clinical symptoms and imaging findings (Zhang et al., 2023). This is because MRI may show disc abnormalities in approximately 30% of asymptomatic adults, so imaging alone cannot determine the course of treatment.
CT is useful for examining bone structure and serves as an alternative for patients who cannot undergo MRI.
Assessing Prognosis After Diagnosis — Symptom Duration Is Key
The duration of symptoms is a key factor in determining prognosis. According to Kögl et al., the longer symptoms persist, the lower the likelihood of nerve recovery (Kögl et al., 2024). Patients who begin treatment within six weeks have the highest recovery rate, while complete recovery may become more difficult when symptoms persist for three months or longer.
Why Conservative Treatment Comes First — The First-Line Standard in Korean Clinical Practice
Initial 6–12 Weeks of Conservative Treatment
Most guidelines recommend 6–12 weeks of conservative treatment unless there are serious neurological deficits. Nonsteroidal anti-inflammatory drugs (NSAIDs) reduce inflammation, while muscle relaxants relieve muscle spasms. Physical therapy and manual therapy strengthen the muscles surrounding the spine and restore flexibility.
After the acute phase has passed, activity levels should be increased gradually. Moving within the limits permitted by pain can aid recovery more than complete bed rest.
According to a 2023 study by Cho et al. analyzing Korean National Health Insurance claims data, the number of patients receiving conservative treatment for lumbar disc herniation increased by more than 30% between 2010 and 2019, while spending on conservative treatment rose from approximately USD 3.34 million to USD 5.6 million. The data confirm that conservative treatment is also the first-line standard in Korean clinical practice, with surgery considered at a later stage (Cho et al., 2023).
Scientific Evidence for Exercise and Rehabilitation
Taşpınar et al. reported that Pilates exercises were effective in reducing pain and restoring function in patients with lumbar disc herniation (Taşpınar et al., 2023). After a six-week clinical Pilates program, pain intensity, disability index scores, flexibility, and both static and dynamic endurance all improved.
Strengthening the core muscles improves spinal stability and helps prevent recurrence. Specialized exercises that centralize symptoms, such as the McKenzie method, are also used as part of conservative treatment.
Why Correcting Body Alignment Matters
Pelvic misalignment causes an uneven distribution of load on the spine. Pelvic imbalance should be considered if one leg appears shorter or if a person tends to lean to one side while walking.
Correcting pelvic and spinal alignment through manual therapy distributes pressure on the discs more evenly. This approach aims not only to reduce pain but also to address factors that contribute to recurrence.
When Surgery Is Needed and Its Timing
An Absolute Emergency — Cauda Equina Syndrome
Cauda equina syndrome occurs when multiple nerve roots are compressed simultaneously. It may be accompanied by loss of sensation in the saddle area (perineum), an inability to control urination or to pass urine, and fecal incontinence. Kögl et al. emphasize that emergency surgery within 24–48 hours is essential (Kögl et al., 2024). The longer surgery is delayed, the greater the risk of permanent functional impairment.
Progressive Motor Deficits and Indications for Early Surgery
Early surgery is considered when muscle weakness is severe, with an MRC grade of 3/5 or lower. This includes being unable to lift the ankle (foot drop) or stand on the heels. In the study by Kögl et al., patients who underwent surgery within three days had the highest recovery rate (Kögl et al., 2024).
Even mild muscle weakness (MRC 4/5) may warrant a discussion of early surgery if it interferes with daily life. Quadriceps weakness that prevents a patient from climbing stairs is a representative example.
Considerations After Failure of Conservative Treatment
Surgery is considered if symptoms do not improve or worsen despite 6–12 weeks of active conservative treatment. The same applies when pain-related deterioration in quality of life, inability to work, or sleep disturbance persists.
However, a 2017 long-term observational study by Lee et al., which followed 505 Korean patients for approximately 52 months, reported that among patients who received nonsurgical Korean medicine and integrative treatment, 68.4% experienced no symptom recurrence during the follow-up period and 90.3% were satisfied with the treatment outcomes (Lee et al., 2017). Surgery should be considered if symptoms do not improve after an adequate course of conservative treatment, but many patients recover before reaching that stage.
It is important to emphasize that the longer symptoms persist, the more difficult complete recovery may be even after surgery. Motor nerve recovery rates may vary widely, from 33% to 75%, depending on the timing and method of treatment.
Closing — Looking at the Whole Body, Not Just the Pain
A herniated lumbar disc is not simply a problem affecting one part of a disc. It often results from a combination of poor posture and movement patterns and muscle imbalances. Focusing only on pain relief can leave the underlying cause unresolved, making recurrence more likely.
An accurate diagnosis and timely treatment are key to recovery. We recommend consulting a specialist to accurately assess your condition and develop a treatment plan that restores balance throughout the body.
This content is provided for medical information purposes, and outcomes may vary depending on individual circumstances. Please consult a specialist for an accurate diagnosis and appropriate treatment.
Frequently Asked Questions
How Can You Tell the Difference Between a Herniated Disc and a Lower Back Sprain?
A lower back sprain often causes only localized pain due to muscle or ligament injury, while a herniated disc typically causes radiating pain that extends down the leg. If the pain worsens when you cough or is accompanied by leg numbness, you should consider the possibility of a herniated disc. An MRI can provide an accurate diagnosis.
Should I Avoid Exercise If I Have a Herniated Disc?
Once the acute phase has passed, appropriate exercise can actually aid recovery. It is safe to start with low-impact exercises such as swimming, walking, and yoga, and gradually increase the intensity. However, you should avoid lifting heavy weights or movements that excessively twist the lower back.
What Is the Recurrence Rate After Disc Surgery?
The recurrence rate within 5–10 years after surgery is reported to be approximately 10–25%. Reducing the risk of recurrence requires a combination of weight management, core muscle strengthening, and maintaining proper posture. It is important to view surgery not as the end, but as a new beginning.
Can Younger People Develop a Herniated Disc?
People in their 20s and 30s can also develop a herniated disc due to poor posture or excessive exercise. It is becoming increasingly common, especially among people whose jobs require them to sit for long periods. Younger people tend to recover more quickly, but without lifestyle changes, their risk of recurrence is correspondingly high.
Related Medical Information
For a deeper understanding of the medical definition, pathology, diagnostic criteria, and natural history of lumbar disc herniation, please see Linkare Knowledge — Lumbar Disc Herniation Medical Information. It includes clinical guidelines from South Korea, Japan, and the United States, along with meta-analysis data on the spontaneous resorption rate of herniated discs.
References
Cho, S., et al. (2023). Analysis of Conservative Treatment Trends for Lumbar Disc Herniation with Radiculopathy in Korea: A Population-Based Cross-Sectional Study. Healthcare (Basel), 11(16), 2353.
Jung, J. M., et al. (2020). Trends in Incidence and Treatment of Herniated Lumbar Disc in Republic of Korea: A Nationwide Database Study. Journal of Korean Neurosurgical Society, 63(1), 108-118.
Kögl, N., Petr, O., Löscher, W., Pinggera, D., Hartmann, S., Rülicke, R., Thomé, C., & Kerschbaumer, J. (2024). Lumbar Disc Herniation — the Significance of Symptom Duration for the Indication for Surgery. Deutsches Ärzteblatt International, 121(10), 317-324.
Lee, J., et al. (2017). Long-Term Course to Lumbar Disc Resorption Patients and Predictive Factors Associated with Disc Resorption. Evidence-Based Complementary and Alternative Medicine.
Taşpınar, G., Angın, E., & Oksüz, S. (2023). The Effects of Pilates on Pain, Functionality, Quality of Life, Flexibility and Endurance in Lumbar Disc Herniation. Journal of Comparative Effectiveness Research, 12(1), e220144.
Zhang, A. S., Xu, A., Ansari, K., Hardacker, K., Anderson, G., Alsoof, D., & Daniels, A. H. (2023). Lumbar Disc Herniation: Diagnosis and Management. The American Journal of Medicine, 136(7), 645-651.