Patient Basics: Herniated Disk

A herniated disk (also called a slipped or ruptured disc) happens when the soft center of a spinal disk, one of the cushions that sit between the vertebrae (spine bones), pushes out through a crack in its tougher outer layer. If it presses on a nerve, it can cause pain, numbness or weakness in a leg or arm. Most people get better within a few weeks to months without surgery.

Key points

• Most herniated disks are in the lower back, where they often cause sciatica (pain running down one leg).
• Staying gently active heals faster than bed rest.
• Many people have disk bulges on an MRI without any pain, so scans are used only when they would change treatment.
• Surgery helps people with severe or lasting symptoms, or with weakness that gets worse.
• New trouble controlling your bladder or bowels, or numbness between your legs, is an emergency.

What causes a herniated disk

Your spine is a stack of bones (vertebrae). Between each pair sits a disk, a round cushion with a jelly-like center and a tough, fibrous outer ring. With age, disks lose water and the outer ring can crack. A sudden load or twist can then push some of the center out. Nerves leave the spinal canal right next to the disks, so the bulge can press on a nerve root and inflame it.

The risk is higher with:

• Age, mostly between 30 and 50
• Lifting heavy objects with a rounded back, especially with twisting
• Jobs with heavy lifting, lots of bending, or long hours driving
• Extra body weight
• Smoking, which reduces blood supply to the disks
• Family history. Genes play a part in how quickly disks wear.

Often there is no single injury, and the pain starts after an ordinary movement such as bending to pick something up.

Herniated disk symptoms

Lower back (lumbar)

Most herniations happen at the two lowest levels, called L4-L5 and L5-S1. They cause:

• Sciatica: sharp or burning pain from the buttock down the back or side of one leg, often below the knee
• Numbness or tingling in the leg or foot
• Weakness, such as trouble lifting the front of the foot or standing on tiptoe
• Low back pain, which may be milder than the leg pain

Pain is often worse with sitting, bending forward, coughing or sneezing. Higher lumbar disks, such as L2-L3, are less often affected. They tend to cause pain in the front of the thigh or groin.

Neck (cervical)

A herniated disk in the neck can cause pain in the neck and shoulder blade that shoots down one arm, with numbness, tingling or weakness in the hand.

Middle back (thoracic)

Herniations in the middle back are uncommon. They can cause pain that wraps around the chest or belly like a band.

Warning signs: when a herniated disk is an emergency

A large herniation can squeeze the bundle of nerves at the bottom of the spinal canal. This is called cauda equina syndrome, and it needs surgery within hours to protect nerve function. Go to an emergency department right away if you have:

• New trouble passing urine, or leaking urine or stool
• Numbness in the groin, genitals, inner thighs or buttocks (the areas that would touch a saddle)
• Weakness in one or both legs that is getting worse quickly
• Loss of sexual sensation

With a neck disk, see a doctor urgently for clumsy hands, trouble with balance or walking, or weakness in both arms or legs.

How it’s diagnosed

A doctor can usually diagnose a herniated disk from your symptoms and an exam. They test your strength, reflexes and feeling. Lifting your straight leg while you lie on your back often brings on the leg pain.

An MRI shows disks and nerves clearly. Doctors usually order one only if there are warning signs, weakness that gets worse, or pain that hasn’t improved after about 6 weeks and surgery or an injection is being considered. Many adults without symptoms have disk bulges on MRI, so a bulge alone doesn’t prove it is causing your pain. Nerve tests (EMG) are sometimes used.

How a herniated disk is treated

Self-care

• Keep moving. Rest for a day or two if pain is severe, then walk short distances several times a day. Long bed rest slows recovery.
• Heat or ice for 15 to 20 minutes at a time, whichever feels better.
• Pain relievers such as ibuprofen or naproxen. Acetaminophen may help a little. Check with a doctor if you have kidney, stomach or heart problems.
• Change positions often. Avoid long periods of sitting and heavy lifting while symptoms are bad.

Physical therapy

A physical therapist teaches exercises that ease nerve pain, strengthen the core and back muscles, and improve how you move and lift. Some people find that certain movements, such as gentle backward bending, ease leg pain. Others do better avoiding them, so a therapist can tailor the plan.

Medicines and injections

Doctors sometimes prescribe a short course of steroid pills or a muscle relaxant, though the benefit is modest. An epidural steroid injection places anti-inflammatory medicine near the irritated nerve. It can ease leg pain for weeks to months while the disk heals. Opioids are best avoided, or used only for a few days.

Surgery

Surgery may help if leg pain stays severe after 6 to 12 weeks of other treatment, if weakness worsens, or right away for cauda equina syndrome. The usual operation in the lower back is a microdiscectomy, which removes the piece of disk pressing on the nerve through a small cut. It often eases leg pain quickly. In the neck, surgeons may remove the disk and fuse the two bones together, or replace the disk with an artificial one.

Recovery and outlook

About 9 in 10 people improve without surgery, most within 6 weeks to 3 months. The pushed-out part of the disk often shrinks as the body reabsorbs it. Leg pain usually eases before numbness does. A disk can herniate again, at the same level or another one.

Lowering your risk

• Lift with your knees bent and the load close to your body, and avoid twisting while lifting.
• Stay active, and build core and back strength.
• Keep a healthy weight.
• Don’t smoke.
• Take breaks to stand and move if you sit for long periods.

Common questions about herniated disks

How can I heal a herniated disc quickly?

There’s no quick fix, but you can help it heal. Keep moving with short walks, use heat or ice, take anti-inflammatory pain relievers if they’re right for you, and start physical therapy exercises. Avoid long bed rest and heavy lifting. Most people feel much better within 6 weeks.

Is a bulging disc the same as a herniated disc?

Not quite. A bulging disc spreads out evenly beyond its normal edge, like a hamburger too big for its bun, and is common with age. A herniated disc has a crack that lets the inner material push out in one spot. Both can press on nerves, though herniations more often cause symptoms.

Do herniated disks run in families?

They can. Studies of twins and families show that genes affect how quickly disks wear and how likely they are to herniate. Lifestyle still matters, so staying active, keeping a healthy weight, not smoking and lifting with good form all lower your risk.

Questions to ask your doctor

• Which disk is causing my symptoms?
• Do I need an MRI?
• Which exercises and activities are best for me right now?
• Would an injection or surgery help, and when?
• Which symptoms mean I should come back right away?

Learn more

• Herniated disk (MedlinePlus, U.S. National Library of Medicine)
• Back pain (National Institute of Arthritis and Musculoskeletal and Skin Diseases)

This guide is general information and doesn’t replace advice from your own doctor. Last updated October 2026.