Quick answer. Sciatica is pain that radiates from the lower back down through the buttock and leg, often with tingling, numbness or weakness, and it is a symptom rather than a disease in itself. It is usually caused by a pinched nerve root in the lower spine, most commonly from a herniated (slipped) disc, and sometimes from spinal stenosis or other causes. Most cases settle within a few weeks by staying active, using simple pain relief and doing physiotherapy, with nerve-pain medication, steroid (epidural) injections or surgery reserved for severe or persistent cases. RED FLAGS needing immediate A&E care include loss of bladder or bowel control, numbness around the groin or inner thighs (saddle numbness), or rapidly worsening leg weakness, as these can signal cauda equina syndrome.
Sciatica is one of the most common reasons people in Singapore seek help for lower back and leg pain. It describes pain that travels along the path of the sciatic nerve, from the lower back through the buttock and down the back of the leg, and it is a symptom of nerve irritation rather than a diagnosis on its own. The good news is that the large majority of cases improve on their own within weeks with simple, conservative care. This guide explains what sciatica feels like, what causes it, how it is diagnosed and treated in Singapore, and the warning signs that mean you should seek urgent medical attention.
At a glance
| Treatment stage | What it involves | Notes |
|---|---|---|
| Self-care (first weeks) | Staying active, gentle movement, avoiding prolonged bed rest, simple pain relief (paracetamol/NSAIDs) | Most cases improve within a few weeks; first-line for uncomplicated sciatica |
| Physiotherapy | Stretches, nerve-mobilising and core/back-strengthening exercises; heat/ice and modalities | Mainstay of recovery; helps function and reduces recurrence |
| Medication | Anti-inflammatories and, where appropriate, nerve-pain medication | Prescribed and reviewed by a doctor |
| Injections | Steroid (epidural) injection around the affected nerve | Considered for severe or persistent pain not responding to the above |
| Specialist review & imaging | Referral to spine surgeon/neurosurgeon; MRI to plan treatment | For severe, persistent or progressive symptoms, or red flags |
| Surgery | Microdiscectomy or decompression to relieve nerve pressure | Reserved for severe/persistent cases, progressive weakness, or cauda equina |
What is sciatica and what does it feel like?
Sciatica is pain caused by irritation or compression of the sciatic nerve or the nerve roots in the lower spine that form it. The pain typically runs from the lower back or buttock down one leg, and may extend below the knee to the calf or foot. People often describe it as sharp, burning, or like an electric shock, and it can be made worse by sitting for long periods, bending, coughing or sneezing.
Alongside the pain, you may notice tingling, numbness or pins-and-needles in the leg or foot, and sometimes weakness in the affected leg. Sciatica is usually felt on one side only. It is important to remember that sciatica is a symptom: the underlying problem is whatever is pressing on or irritating the nerve.
What causes sciatica?
The most common cause of sciatica is a herniated (slipped) disc in the lower back. The spinal discs sit as cushions between the vertebrae; when the soft inner part of a disc bulges through a tear in its tougher outer layer, it can press on a nearby nerve root and trigger pain that radiates down the leg.
- Herniated/slipped disc – the leading cause, where disc material compresses a nerve root.
- Spinal stenosis – narrowing of the spinal canal, more common with age, which can crowd the nerves.
- Degenerative disc disease and bone spurs – age-related wear that can narrow the space around the nerves.
- Less common causes – such as injury, or rarely a tumour pressing on the nerve.
Risk factors include heavy or repetitive lifting, poor lifting technique, prolonged sitting, weak core and back muscles, a sedentary lifestyle and being overweight.
How is sciatica diagnosed?
Sciatica is usually diagnosed clinically – a GP or specialist will ask about your symptoms and examine your back, legs, reflexes, strength and sensation. A common test is the straight-leg raise, which reproduces the radiating pain when the nerve is irritated.
Most people do not need a scan to begin treatment. Singapore primary-care guidance emphasises avoiding routine imaging for uncomplicated back pain, because scans often show changes that are not the cause of the pain and do not improve outcomes. An MRI is reserved for cases where there are red flags, where symptoms are severe or persistent despite conservative care, or when surgery is being planned, as it shows the discs and nerves in detail.
Treatment options in Singapore
The large majority of sciatica improves with conservative (non-surgical) care, and treatment usually follows a stepwise approach:
- Stay active – gentle movement and continuing normal activities as tolerated is better than prolonged bed rest, which can slow recovery.
- Simple pain relief – such as paracetamol or anti-inflammatory medication (NSAIDs) to manage pain and keep you moving.
- Physiotherapy and exercise – targeted stretches, nerve-mobilising exercises, and progressive core and back-strengthening programmes. Heat, ice or other modalities may also be used.
- Nerve-pain medication – if pain is largely nerve-related, a doctor may prescribe medicines that target nerve pain.
- Steroid (epidural) injections – for more severe or persistent pain, an injection of steroid around the affected nerve can reduce inflammation and pain.
Surgery, most commonly a microdiscectomy to remove the disc material pressing on the nerve, is reserved for severe, persistent or progressive cases that do not respond to conservative care, or where there are red-flag neurological signs.
When to see a doctor – and red flags for urgent care
See a GP if your sciatica is severe, is not improving after a few weeks of self-care, keeps coming back, or is interfering with daily life. A GP can confirm the diagnosis, prescribe pain relief and refer you to a physiotherapist or, where needed, a specialist – an orthopaedic spine surgeon or neurosurgeon – for persistent or complex cases.
Seek immediate care at an Emergency Department (A&E) if you experience any of these warning signs, which can indicate cauda equina syndrome, a rare but serious emergency requiring urgent surgery:
- Loss of bladder or bowel control (incontinence, or difficulty passing urine).
- Numbness around the groin, buttocks or inner thighs (saddle numbness).
- Significant or rapidly worsening weakness in one or both legs.
- Sciatica affecting both legs (bilateral sciatica).
Also seek prompt review if back pain follows a significant injury, or comes with fever, unexplained weight loss or night pain.
Related guides
- Best Physiotherapy Clinics in Singapore — our editorial shortlist
- physiotherapy clinics directory
- Chiro vs physio vs osteo
- Back pain treatment
- Neck pain & slipped disc
Sources
- HealthHub (Singapore) – Herniated Disc (Slipped Disc)
- SingHealth – Spine and Spinal Cord Injury Diseases: Recognising Red Flags in Primary Care
- SingHealth – Managing Low Back Pain in Primary Care
- SingHealth – Low Back Pain (Spinal Care)
- Raffles Orthopaedic Centre – Sciatica
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