Archive · 6 Aug 2026
Sciatica vs Slipped Disc: Doctor Explains The Difference
Sometimes your back or leg hurts and people talk about two big words: sciatica and slipped disc.
They sound similar, but they mean different things.
Think of your spine like a tower of building blocks, with soft cushions between them.
A 'slipped disc' is when one of those cushions gets squashed and pushes out, even though it doesn't really 'slip.'
If that squashed cushion presses on a nerve, it can hurt.
'Sciatica' is just the name for that pain when it travels from your back down your leg, like a long wire sending a buzz.
But sciatica can also happen for other reasons, not only a squashed cushion.
Doctors figure out which one you have by asking questions and testing your muscles and reflexes.
They usually only take special pictures (an MRI) if the problem is serious.
Most people get better with exercises and small amounts of rest, not by staying in bed all day.
Sciatica is a symptom — pain travelling along the sciatic nerve — not a diagnosis, while a slipped disc is a structural problem with the spine.
A slipped disc (herniated or prolapsed disc) occurs when the disc's soft core bulges out and presses on nearby nerve endings.
Sciatica can be caused by a slipped disc as well as by spinal stenosis, degenerative disc disease, piriformis syndrome, or spondylolisthesis.
Sciatica pain is often sharp, electrical, shooting, or burning, and when caused by a disc it usually travels below the knee with tingling, numbness, or weakness.
Diagnosis relies on clinical examination including the Straight Leg Raise; MRI is reserved for severe, unresponsive, or neurologically compromised cases.
- Who
- People with back or leg pain; explained by Dr Yogesh K, Senior Consultant at Aster Whitefield Hospitals.
- What
- The difference between sciatica (a nerve-pain symptom) and a slipped disc (a structural spine problem), including causes, symptoms, diagnosis, and treatment.
- When
- Not specified in the article.
- Where
- Not specified; the article was published by NDTV and authored by a doctor from Aster Whitefield Hospitals.
- Why
- Correct diagnosis of the root cause determines the right treatment, since not every leg pain is sciatica and not all sciatica comes from a disc problem.
- Sciatica
- Symptom: pain following the sciatic nerve, the body's largest nerve, usually on one side
- Slipped disc
- Herniated or prolapsed disc; the soft core bulges out and presses on nerve endings
- Other causes of sciatica
- Spinal stenosis, degenerative disc disease, piriformis syndrome, spondylolisthesis
- Key symptom difference
- Disc herniation alone: localised back pain and stiffness; with nerve compression: pain below the knee with tingling, numbness, or weakness
- Conditions mimicking sciatica
- Hip arthritis, sacroiliac joint disease, vascular problems, muscle strain, nerve diseases
- Diagnosis
- History, physical exam, muscle strength, reflexes, sensation, gait, Straight Leg Raise; MRI only for severe cases
- Red flag symptoms
- Foot weakness, inability to move toes, saddle numbness, loss of bowel or bladder control
- Treatment
- Pain management, physiotherapy, activity changes and exercises; surgery for progressive weakness, neurological deficit, or continued pain