Lumbar Discectomy: Surgery for a Herniated Disc

What is a herniated disc?

A disc is a cushion between two spinal bones. Its softer inner material can push through its outer layer and irritate or press on a nearby nerve. Symptoms can travel from the buttock into the leg or foot and may include pain, tingling, numbness, or weakness. Where you feel symptoms helps identify which nerve may be involved.

An MRI is interpreted alongside your history and examination. The size of a disc bulge alone does not establish the need for surgery. Ask the surgeon to show how the finding relates to your symptoms. AANS explains lumbar disc herniation and treatment choices.

When is surgery considered?

Many people improve with time and nonsurgical care. Depending on your health, options include activity adjustments, physical therapy, suitable medicines, and selected injections. If your strength is stable and symptoms are manageable, continued observation may be reasonable. You should know how and when your progress will be reassessed.

Surgery may be considered when leg symptoms continue to limit your life despite appropriate care, or when weakness or other nerve problems are worsening. Go to the nearest emergency department immediately for new or worsening leg weakness, new numbness around the genitals or anus, new difficulty starting or passing urine, loss of the sensation that you need to urinate or have a bowel movement, or loss of bladder or bowel control. Any one of these symptoms is enough to seek help. The NHS describes early warning signs that need emergency care. Do not wait for a scheduled surgical consultation.

What does the surgeon remove?

The operation usually takes place under general anesthesia. Through an incision in your lower back, the surgeon reaches the affected nerve and removes the disc fragment causing pressure. A small amount of bone or ligament may also be removed to make a safe working space. Most of the disc is usually left in place.

Microdiscectomy uses magnification, often a microscope. Other approaches use different instruments or viewing systems. The choice depends on the disc’s location, your anatomy, and the surgeon’s judgment. Ask which approach is proposed and why. Johns Hopkins describes minimally invasive lumbar discectomy.

A straightforward discectomy is different from removing a disc as part of a fusion. Fusion is not automatically required. If your surgeon recommends it, ask what additional problem—such as instability—the fusion is intended to address.

Setting realistic goals

Discectomy is generally more helpful for pain traveling down a leg than pain confined to the lower back. Relieving pressure creates an opportunity for the nerve to recover, but it does not guarantee complete recovery. Long-standing numbness or weakness can take longer to change or may remain.

Choose goals that describe daily life: sitting through a meal, sleeping with fewer interruptions, or walking to the mailbox. Explain which symptom matters most to you. Discuss the chance of meeting that goal, what improvement may look like, and what the next step would be if symptoms continue. Mayo Clinic discusses the goals and limits of diskectomy.

Risks and the possibility of another herniation

Risks include infection, bleeding, blood clots, anesthesia problems, injury to nearby nerves or blood vessels, and a tear in the covering around the nerves that allows spinal fluid to leak. Nerve injury can cause new or persistent pain, numbness, weakness, or bladder or bowel difficulties. A leak may require repair or additional treatment.

The remaining disc can herniate again at the same level; a different disc can also become symptomatic later. Recurrent symptoms do not automatically mean another operation is needed. The team must reassess the cause. Repeat surgery may carry different risks because of scar tissue. Discuss your individual risk without relying on a single success percentage.

Before surgery

Tell the team about all medicines and supplements, allergies, nicotine use, previous spine procedures, and problems with anesthesia. Obtain written instructions about which medicines to take and any planned changes. Blood thinners need a coordinated plan; never stop or restart them independently. Follow your hospital’s fasting instructions.

Arrange a ride home, help with tasks that require lifting or bending, and a place to keep needed supplies within easy reach. Let the team know if you live alone. Before leaving the hospital, make sure you have your discharge medicines, wound instructions, follow-up arrangements, and a number for urgent questions.

What to expect afterward

The team checks your leg movement and sensation, pain control, urination, and ability to move safely. The timing of discharge varies. You may have incision soreness even if the original leg pain feels better. Changes in nerve symptoms should be discussed with the team rather than assumed to be a normal part of healing.

Build up walking according to your discharge plan. Ask specifically about lifting, bending, driving, work, and when physical therapy would be useful. Do not drive while taking medicines that impair alertness. For wound drainage, fever, or worsening pain, use your surgical team’s discharge contact route the same day; seek urgent assessment if you cannot obtain prompt help. Call 911 for breathing trouble, chest pain, or collapse.