INTRODUCTION AND DEFINITION OF THE CONDITION/TREATMENT
A lumbar herniated disc occurs when part of a disc between the lower-back vertebrae extends beyond its normal position. If the displaced material compresses a nerve root, symptoms may include lower-back pain, pain spreading through the buttock and leg (sciatica), tingling, numbness or weakness. An MRI finding of a herniated disc does not, by itself, mean surgery is necessary. Many people improve over time with non-surgical care.
Lumbar herniated disc surgery aims to relieve pressure on an affected nerve in appropriately selected patients. It is generally intended to improve leg pain and nerve-related loss of function rather than to eliminate every type of lower-back pain. Surgery cannot guarantee complete symptom relief or recovery of a nerve that has been affected for a long time. Decisions are based on symptoms, neurological examination and imaging considered together.
CAUSES AND SYMPTOMS
Age-related changes in the disc, individual susceptibility, repetitive strain and some sudden loads may contribute to disc herniation. Symptoms depend on the level of the herniation and whether a nerve root is irritated or compressed. Pain may remain in the lower back or travel to the buttock, thigh, calf or foot. Coughing, straining or certain movements can make it worse.
Other symptoms include burning or electric-shock sensations down the leg, reduced sensation, pins and needles, weakness when lifting the foot or toes, and discomfort when sitting for long periods. Not all back or leg pain is caused by a herniated disc, so other possible causes must be considered.
URGENT WARNING: New difficulty or inability to pass urine, loss of bladder or bowel control, numbness around the genitals or saddle area, or rapidly worsening leg weakness may indicate severe nerve compression. Seek emergency medical assessment immediately rather than waiting for a routine appointment.
DIAGNOSIS AND ASSESSMENT METHODS
The clinician asks when the pain began, where it travels, how long it has lasted, whether numbness or weakness is present, and how it affects daily activities. A neurological examination assesses strength, reflexes, sensation and nerve-tension signs. When appropriate, magnetic resonance imaging (MRI) can identify the level of the herniation and its relationship to the nerve roots. MRI is not routinely needed for every new episode of lower-back pain; it is most useful when results could change management.
Additional imaging or electromyography (EMG) may occasionally help clarify an uncertain diagnosis. Before considering surgery, symptoms and examination findings should match the site and side of nerve compression seen on imaging. A report describing a “large herniation” is not, on its own, an indication for an operation.
TREATMENT OPTIONS
Most people begin with non-surgical care. Staying safely active, avoiding prolonged bed rest, using pain relief after clinical assessment, and following an appropriate physiotherapy and exercise programme may reduce symptoms. An epidural injection may be considered for selected people with acute, severe sciatica. The expected benefit and potential adverse effects differ among patients and treatments.
Surgery may be considered when disabling leg pain or reduced function continues despite appropriate non-surgical treatment and imaging supports the symptoms, or when muscle weakness progresses. Suspected serious compression affecting bladder or bowel function requires emergency assessment. The expected benefit of disc surgery is different for patients whose only complaint is lower-back pain; shared decision-making is essential.
SURGICAL PROCEDURE WHEN AN OPERATION IS NEEDED
The surgeon considers the location and level of the herniation, nerve findings, previous care and the person's overall health. A common procedure is microdiscectomy. Through a suitable incision, a microscope or magnification is used to reach the affected nerve and remove the disc fragment causing pressure. Endoscopic discectomy, using a camera and specialised instruments, is another option in selected cases. A wider exposure may be necessary for some disc patterns or related conditions.
The aim is usually to remove enough material to free the nerve, not necessarily to remove the entire disc. Spinal fusion, involving fixation of the vertebrae, is not a routine requirement for an isolated lumbar disc herniation. Open, microsurgical and endoscopic approaches have different indications; a smaller incision does not automatically mean a better outcome.
Before surgery, the team discusses likely benefits, non-surgical alternatives, anaesthesia and complications. These may include bleeding, infection, nerve injury, a tear in the covering of the nerves with cerebrospinal fluid leakage, persistent symptoms, recurrent herniation or the need for further surgery. Individual risks should be reviewed with the treating team.
RECOVERY AND THE POSTOPERATIVE PERIOD
The time to begin walking, length of hospital stay and return to work depend on the procedure, preoperative nerve function, other health conditions and the physical demands of the job. Gentle early movement and short walks may be encouraged when appropriate. Instructions about lifting, bending, twisting and returning to sport should come from the operating team and be tailored to the individual.
Leg pain may improve relatively early, while numbness and weakness can take longer to recover. Long-standing nerve compression may leave some symptoms unresolved. Recovery also involves wound care, medication as prescribed, rehabilitation when needed and follow-up visits. New or worsening weakness, bladder or bowel changes, fever, wound drainage or unexpectedly severe pain should prompt urgent medical review.