How Is Sciatica Diagnosed and Treated by a Physiotherapist?
A physiotherapist diagnoses sciatica through a clinical assessment, checking movement, reflexes, and specific tests that reproduce the nerve pain, rather than relying on imaging in most cases.
Treatment typically focuses on relieving pressure on the sciatic nerve through targeted exercises, manual therapy, and movement advice, since prolonged rest often makes symptoms worse rather than better.
Most people see meaningful improvement within a few weeks, though the right approach depends on identifying exactly where along the nerve pathway the irritation is coming from.
What Is Sciatica?
Sciatica refers to pain that travels along the path of the sciatic nerve, which runs from the lower back, through the buttock, and down the back of the leg. It's not a condition in itself, but a symptom, usually caused by irritation or compression of the nerve somewhere along that pathway, most commonly in the lower spine. (1)
Because the nerve runs such a long distance, symptoms can show up quite differently from person to person, ranging from a dull ache to sharp, shooting pain, or tingling and numbness anywhere from the lower back down to the foot.
How Is Sciatica Diagnosed?
Diagnosing sciatica usually starts with a detailed conversation about your symptoms: where the pain travels, what movements make it better or worse, and how it developed. Our clinician(s) will also ask more detailed questions to check for any serious warning signs, which in most cases, it is negligible. This is followed by a physical assessment that typically includes:
- Movement testing, to see which positions or movements reproduce or ease the pain
- Neurological checks, such as reflexes, muscle strength, and sensation in the leg
- Specific nerve tension tests, like the straight leg raise, which can help confirm sciatic nerve involvement
- Posture and movement pattern observation, to identify contributing factors like poor lifting mechanics or prolonged sitting
In most cases, imaging such as an MRI isn't needed to diagnose sciatica or begin treatment. It's usually only considered if symptoms are severe, aren't improving with treatment, or if there are specific signs that suggest something more serious needs to be ruled out.
What Causes Sciatic Nerve Irritation?
Sciatica is often linked to an underlying issue in the lower spine, including:
- A herniated or bulging disc pressing on the nerve root (2)
- Spinal stenosis, a narrowing of the space around the nerve
- Piriformis syndrome, where a muscle in the buttock irritates the nerve
- Degenerative changes in the spine that develop with age
- Prolonged poor posture or repetitive movements that place stress on the lower back
Identifying which of these is driving your specific symptoms is an important part of building an effective treatment plan, since the right approach can vary depending on the underlying cause.
How Do Physiotherapists Treat Sciatica?
Treatment is tailored to the underlying cause and the stage of your symptoms, but generally focuses on relieving pressure on the nerve, restoring movement, and preventing recurrence.
Movement and Activity Advice: Contrary to what many people assume, complete bed rest tends to make sciatica worse rather than better. A physiotherapist will typically guide you on which movements and positions to avoid in the short term, alongside gentle, appropriate activity to keep things moving.
Manual Therapy: Hands-on techniques, such as soft tissue work and joint mobilisation, can help reduce muscle tension and improve movement in the lower back, which may ease pressure on the nerve.
Targeted Exercises: A structured exercise programme, often including nerve gliding exercises, core strengthening, and specific stretches, helps address the underlying cause and reduce the likelihood of symptoms returning.
Acupuncture: This can be used alongside other treatment to help manage pain and reduce muscle tension in the lower back and glutes.
Stimpod therapy: Transcutaneous Pulsed Radiofrequency Stimulation is an advanced, non-invasive treatment designed to reduce nerve pain, accelerate healing, and restore healthy nerve function. Stimpod therapy delivers precise electrical pulses to specific nerves through small electrodes placed on the skin, creating a treatment option that is completely drug-free, non-invasive, and safe for long-term use.
How Long Does Sciatica Take to Improve?
For many people, symptoms begin to ease within a few weeks of starting the right treatment, particularly with early intervention. However, recovery time varies significantly depending on the underlying cause, how long symptoms have been present, and how consistently the recommended exercises and advice are followed.
Ignoring symptoms or continuing with aggravating movements and postures can prolong recovery, so early assessment tends to lead to a smoother, faster resolution.
When Should You Seek Urgent Medical Attention for Sciatica?
Most sciatica responds well to physiotherapy. Occasionally, certain symptoms need urgent medical assessment rather than a physiotherapy appointment. These include:
- Loss of bladder or bowel control
- Numbness around the groin or inner thighs (saddle anaesthesia)
- Significant, progressive weakness in both legs
These can be signs of a rare but serious condition called cauda equina syndrome and require emergency medical attention.
Get Expert Sciatica Treatment in Chester
If you're dealing with sciatic pain that's affecting your daily life, an accurate diagnosis is the first step toward effective treatment. At Relive Physiotherapy in Chester, we'll assess your specific symptoms and build a tailored plan to relieve pressure on the nerve and get you moving comfortably again.
Struggling with sciatica? Book an assessment with Relive Physiotherapy today and start your recovery with expert guidance.
Frequently Asked Questions
Does sciatica need an MRI scan to diagnose it?
Not usually. Most cases can be diagnosed through a clinical assessment involving movement testing, reflex checks, and specific nerve tension tests. Imaging is typically only used if symptoms are severe or not improving as expected.
Is rest or movement better for sciatica?
Movement is generally more helpful than complete rest, which can make symptoms worse. A physiotherapist can guide you on which specific movements to avoid while keeping you appropriately active.
What is the most common cause of sciatica?
It's often linked to a herniated or bulging disc in the lower spine pressing on the nerve root, though other causes like spinal stenosis or piriformis syndrome can produce similar symptoms.
How long does sciatica usually last?
Many people notice improvement within a few weeks of starting appropriate treatment, though this varies depending on the underlying cause and how consistently treatment advice is followed.
When is sciatica a medical emergency?
Symptoms like loss of bladder or bowel control, numbness around the groin, or significant weakness in both legs need urgent medical attention, as they can indicate a rare condition called cauda equina syndrome.
References:
1.https://www.nhs.uk/conditions/sciatica/
2.https://cks.nice.org.uk/topics/sciatica/
About the Author:
Mohana Nedunchezian
Lead Physiotherapist, Independent Non-Medical Prescriber and Injection Therapist
Mohana Nedunchezian is a Specialist Physiotherapist at Relive Physiotherapy with over 15 years' experience in Musculoskeletal Medicine. She is a qualified Injection Therapist, an APPI-certified Pilates Physiotherapy Instructor, and trained in Kinesiology taping, Acupuncture, and Bobath techniques.
Mohana holds a Master's degree in Physiotherapy and spent over 10 years as a Specialist Physiotherapist in the NHS before joining Relive Physiotherapy. She has a particular interest in 1:1 Pilates and joint mobilisation techniques, and brings a warm, engaging approach to every session.
Mohana is a member of the Acupuncture Association of Chartered Physiotherapists (AACP) and the Association of Chartered Physiotherapists in Sports Medicine (ACPSEM).
Outside the clinic, Mohana is a full-time mother to two young children and enjoys music and cooking in her free time.
