What Causes Sciatica, and When Can Physiotherapy Help?
You stand up after a long afternoon call. A zing runs from your lower back down the back of your thigh. You shake out your leg and carry on.
It returns on the MRT ride home. It returns the next morning, when you sit on the edge of the bed and your back feels like it has set overnight.
That sensation is worth paying attention to, but it does not automatically mean you have sciatica. Sciatica refers to pain caused by irritation or compression of nerve roots in the lower back. Identifying the likely cause helps guide treatment. Physiotherapy may help manage symptoms, improve movement and build strength, depending on the underlying condition.
What is sciatica, and what does it feel like?
Sciatica describes pain that radiates along the path of the sciatic nerve, usually from the lower back or buttock into one leg. The sciatic nerve is the largest nerve in the body and runs through the buttock and down the back of the leg.
Sciatica is a symptom pattern rather than a diagnosis of the underlying cause. Assessment helps identify whether symptoms are related to irritation or compression of a spinal nerve root, or another condition that can cause similar pain.
Common symptoms:
- Pain in the buttock or back of the leg, usually on one side
- A burning, sharp or electric feeling
- Pins and needles, or numbness in the leg or foot
- A feeling of weakness in the leg or foot
- Pain that flares when you sit, cough, sneeze or bend
What causes sciatica?
Sciatica most commonly occurs when a spinal nerve root is irritated or compressed. Possible causes include:
Bulging or herniated disc. The cushioning disc between two vertebrae bulges or herniates and may irritate or compress a nearby nerve root. Disc herniation is a common cause of sciatica.
Spinal stenosis. The spaces within the spine narrow and may put pressure on nerve roots. Symptoms can worsen with standing or walking and ease when sitting or leaning forward, particularly with lumbar spinal stenosis.
Degenerative changes in the spine. Age-related changes, such as enlargement of facet joints or thickening of nearby ligaments, may contribute to narrowing around the spinal nerves.
Deep gluteal syndrome. In some people, structures in the deep buttock region may irritate or compress the sciatic nerve, a condition sometimes associated with piriformis syndrome. This is less common than a spinal cause, and the diagnosis requires careful assessment because other conditions can produce similar symptoms.
Sacroiliac joint-related pain. The joint between the sacrum and pelvis can refer pain into the buttock or thigh. This is not the same as true sciatica caused by irritation of a spinal nerve root, although the symptoms can overlap.
Can prolonged sitting aggravate sciatica?
Prolonged sitting can aggravate symptoms for some people, particularly when it involves sustained positions that increase their discomfort. Long commutes and working at a poorly set-up desk may make it harder to change position regularly.
There is no single sitting posture or weak-muscle pattern that explains all cases of sciatica. Reduced activity during a painful episode can affect strength and confidence with movement, so gradually returning to tolerable activity is often helpful.
Why does sciatica feel worse in the morning?
Your back has been still for hours. When you wake, it feels stiff and sore, and the first few minutes out of bed can bring the zing back.
Some people notice pain when turning over in bed. Sleeping position may affect comfort, but there is no one sleeping posture or mattress type that is right for everyone.
Try these steps before you stand:
- Lie on your back and bend your knees for a minute
- Try a comfortable movement from the list below, if it does not increase your symptoms
- Roll onto your side, then push yourself up with your arms
- Stand slowly and walk around for a few minutes before you sit
Morning stiffness can occur with back and leg pain, but the timing alone does not identify the cause. Seek assessment if pain is persistent, worsening, regularly disrupts sleep or is accompanied by other concerning symptoms.
What can you do in bed to ease sciatica pain?
Gentle movements may help some people feel more comfortable, but the most suitable exercises depend on the cause and symptom response. Move slowly, stay within a tolerable range and stop if symptoms significantly worsen or spread further down the leg.
- Knee to chest (if comfortable). Lie on your back and gently bring one knee toward your chest. Hold briefly, then release. Do not force the movement or continue if it increases leg symptoms.
- Pelvic tilt. Lie with both knees bent. Gently tighten your abdominal muscles and tilt your pelvis to flatten your lower back slightly against the bed. Relax and repeat only if comfortable.
- Reclined figure-four stretch (only if suitable). Lie on your back, rest one ankle on the opposite thigh and gently draw the supporting thigh toward you. Avoid this stretch if it increases pain, tingling or numbness down the leg.
- Gentle hamstring movement (if suitable). Lie on your back and support the thigh of one leg. Slowly straighten the knee only to a comfortable point, then relax. Avoid pulling hard on the leg, as nerve-related symptoms can be aggravated by excessive tension.
- Hip flexor stretch.This movement is a knee-to-chest stretch rather than a specific hip-flexor stretch. Lie on your back and gently bring one knee toward your chest while the other leg rests comfortably. Stop if symptoms worsen.
- Glute bridge (if suitable). Lie with your knees bent and feet on the bed. Gently tighten your buttock muscles and lift your hips a comfortable distance. Lower slowly. Stop if it aggravates your leg symptoms.
The right exercises depend on your assessment and how your symptoms respond. Some stretches or nerve-tensioning movements may aggravate symptoms in certain people, so do not assume that every stretch is suitable. A physiotherapist can help select and progress exercises safely.
Pay attention to how your body respond. If an exercise causes pain, tingling or numbness to spread further down the leg, stop that movement and seek advice. A change in symptom location can be useful information, but it should not be used on its own to judge recovery.
How can you read your own sciatica pattern?
Activities and positions that ease or aggravate your symptoms can provide useful clues, but they cannot reliably identify the cause on their own. A clinician considers your history and examination findings together.
| Your pattern | What it often suggests |
| Worse with sitting and bending forward, easier standing | Disc-related irritation |
| Builds with walking, eases when you sit or lean forward | Narrowed spinal canal |
| Deep buttock ache after long sitting | Tight buttock muscle or hip involvement |
| Pain low over the back of the pelvis, sharp when turning in bed | Stiff pelvis joint |
When is sciatica an emergency?
Seek emergency medical care (go to A&E) if you notice any of the following:
- Numbness or loss of sensation around the genitals, anus or inner thighs (saddle area)
- New difficulty starting or controlling urination, inability to pass urine, or loss of bowel or bladder control
- New or rapidly worsening weakness, especially if it affects both legs
- Back pain with fever or feeling very unwell, or back pain following a serious fall or accident
These symptoms may indicate a serious condition, infection or injury. They require urgent medical assessment. Do not wait for a routine physiotherapy appointment.
Can sciatica be treated without surgery?
Yes, many people improve without surgery. Management often includes advice to stay active, individually selected exercises and symptom-management strategies. Physiotherapy may form part of this care. Surgery may be considered in selected cases, such as persistent severe symptoms despite appropriate non-surgical care or significant/progressive neurological deficits. Emergency symptoms need urgent medical assessment.
A short period of relative rest may help during a severe flare, but prolonged bed rest is generally discouraged. Gradual, tolerable movement and an individually tailored exercise programme can support recovery.
How does sciatica physiotherapy work, and how long does it take?
Treatment is tailored to the likely cause, symptom severity, functional needs and response over time. The phases and timeframes below are illustrative only; recovery does not follow the same fixed sequence for everyone.
| Phase | Typical window | Goal | What it involves |
| 1. Calm the pain | First 2 weeks | Pain relief | Finding the source, easing positions, gentle hands-on treatment, advice for work and home |
| 2. Restore movement | Weeks 2 to 6 | Freer movement | Spine and hip mobility, gentle nerve-gliding movements, early strengthening |
| 3. Rebuild and prevent | After week 6 | Strength and prevention | Buttock and deep tummy muscle strengthening, a better desk setup, smarter commute habits |
Many episodes improve over several weeks, although symptoms can last for a few months or longer. Recovery varies according to the underlying cause, severity and individual factors.
Where can you find sciatica physiotherapy in Singapore?
At Rapid Physiocare, your first visit includes a review of your history, movement assessment and checks of sensation and strength in your leg. Your plan is based on your findings, because no two presentations are identical. Our sciatica physiotherapy treatment focuses on addressing your symptoms and improving movement through an individualised care plan.
If symptoms persist for a few weeks, worsen, keep returning or interfere with daily activities, arrange an assessment. A thorough evaluation can help clarify the likely cause and guide your next steps.
The stiffness when you stand, the zing on the train and the discomfort in the morning are useful details to share during an assessment. Physiotherapy can help translate your symptoms and examination findings into an individualised management plan. Book a consultation to discuss your next steps.
Frequently Asked Questions
Does sciatica go away on its own?
Often, yes. Many episodes improve over several weeks, although symptoms can last longer. Seek assessment if symptoms persist, worsen, keep returning or are accompanied by weakness. New or progressive weakness needs prompt medical review.
How long does sciatica last?
Many people begin to improve within a few weeks, but sciatica can last from several weeks to a few months or longer. The timeline depends on the cause, severity and response to treatment. An assessment can help provide a more individual estimate.
Is walking good for sciatica?
Short, frequent walks are helpful for many people because they encourage gentle movement and help maintain activity. Keep the pace and distance comfortable, and adjust if symptoms flare. Seek advice if weakness or numbness is worsening.
Why is my sciatica worse in the morning?
Some people experience stiffness or increased pain after being still overnight. Gentle movement may help, but the best approach depends on your symptoms. Seek assessment if pain is persistent, worsening or regularly disrupts sleep.
Should I stay in bed with sciatica?
A brief period of rest or reduced activity may be helpful during a severe flare, but prolonged bed rest is not recommended. Try to continue normal activities as tolerated and gradually return to gentle movement.
What can I do at home for sciatica pain relief?
Change position regularly, take short walks and use a sitting position that feels comfortable. A heat pack may provide temporary relief. Ask a doctor or pharmacist about suitable pain relief. Seek assessment if symptoms persist, worsen or include neurological changes.
Do I need an MRI before starting physiotherapy?
Usually, an MRI is not needed before starting conservative care. Imaging is not routinely recommended unless there are red flags, progressive neurological symptoms or the result is likely to change management. A physiotherapist can assess you and refer you to a doctor when imaging or medical review is indicated.
Can sciatica come back after treatment?
It can. Staying active, gradually rebuilding strength and using strategies that help you manage daily activities may reduce the impact of future episodes. Recurrence is possible, and no exercise or posture routine can guarantee prevention.
