Piriformis syndrome can cause deep buttock pain, tingling, numbness and pain travelling down the back of the leg. Because these symptoms can closely resemble sciatica, it may be difficult to tell whether the problem begins in the lower back, hip or deep gluteal muscles.
Understanding the symptoms of piriformis syndrome, its possible causes and treatment options can help you know when an assessment may be useful.
Who Is This Guide For?
This guide is for adults experiencing persistent buttock pain, discomfort when sitting, or sciatic-type pain spreading into the thigh or leg. It may also help people who have been told they could have piriformis syndrome and want a clearer explanation of the condition, how it differs from sciatica and which treatments may be considered.
What is piriformis syndrome?
The piriformis is a small muscle located deep within the buttock. It runs from the sacrum at the back of the pelvis to the upper part of the thigh bone. The muscle helps rotate the hip outwards and contributes to hip stability during walking and other movements.
Piriformis syndrome is thought to develop when the piriformis muscle irritates or compresses the sciatic nerve. It is often included within the broader term deep gluteal syndrome, which describes sciatic nerve irritation in the deep buttock rather than at the spine.
The sciatic nerve normally passes underneath the piriformis muscle. Tightness, spasm, inflammation, injury or enlargement of the muscle may irritate the nerve. Some people also have a natural anatomical variation in which part of the nerve passes through or around the muscle, although this variation does not automatically cause symptoms.
What are the symptoms of piriformis syndrome?
Symptoms can vary, but pain is usually centred deep in one buttock and may spread down the back of the thigh. Common symptoms include:
- Deep pain or tenderness in one buttock
- Pain after prolonged sitting or driving
- Pain spreading down the back of the thigh
- Tingling, pins and needles or numbness in the leg
- Discomfort when climbing stairs, squatting, running or cycling
- Pain triggered by rotating the hip
Pain may also be felt around the back of the hip and can occasionally travel towards the calf or foot. Many people notice that sitting is particularly uncomfortable, while repeated hip movement during exercise or sport can also make symptoms worse.
What causes piriformis syndrome?
There is not always one clear cause. Piriformis syndrome may develop after the muscle has been overloaded, injured or kept under pressure for long periods. Possible contributing factors include:
- Repetitive running, cycling or sport
- A sudden increase in training intensity or distance
- Prolonged sitting, including long periods of driving
- Direct trauma to the buttock
- Muscle spasm or inflammation
- Movement patterns that overload the deep hip muscles
- Anatomical differences around the sciatic nerve
This may help explain why symptoms can affect athletes, office workers and professional drivers. Some studies suggest that piriformis syndrome may be more common in women, possibly because of differences in pelvic anatomy and hip biomechanics, although the evidence is not conclusive.
How is piriformis syndrome diagnosed?
There is no single examination or scan that definitively confirms piriformis syndrome. Diagnosis usually begins with a detailed discussion of your symptoms followed by a physical assessment.
A clinician may check:
- Where the pain begins and where it travels
- Which positions, activities or movements reproduce the symptoms
- Whether the deep buttock is tender
- Leg strength, sensation and reflexes
- Whether specific hip positions trigger the pain
These checks are important because a slipped disc, narrowing around spinal nerves, hip disease, sacroiliac joint problems and other deep gluteal conditions can produce similar symptoms. Piriformis syndrome is therefore often considered after other likely causes have been assessed or excluded.
Is there a scan that can confirm piriformis syndrome?
No single scan can confirm the diagnosis in every patient. MRI may be helpful when a spinal, pelvic or hip cause needs further investigation. Musculoskeletal ultrasound can assess selected soft tissues and allows the area to be viewed in real time, but a normal scan does not necessarily rule out piriformis syndrome.
An ultrasound-guided local anaesthetic injection may sometimes provide useful diagnostic information. Temporary improvement after a precisely placed injection can support the suspected source of pain, but the response must still be interpreted alongside your symptoms, examination and clinical history.
At RAD Clinics, we review your symptoms and relevant medical history before deciding whether ultrasound assessment or an image-guided procedure may be appropriate. We also explain clearly what imaging can and cannot show, so you understand the purpose and limitations of the appointment.
Piriformis syndrome vs sciatica: what is the difference?
Piriformis syndrome and sciatica can feel very similar because both may irritate the sciatic nerve and cause pain travelling down the leg. The main difference is where the irritation is thought to begin. Typical sciatica usually starts at a nerve root in the lower spine, while piriformis syndrome involves suspected irritation of the sciatic nerve within the buttock.
| Feature | Piriformis syndrome | Spinal sciatica |
|---|---|---|
| Usual starting point | Deep buttock | Lower back or spinal nerve root |
| Common triggers | Sitting or hip rotation | Spinal movement; sometimes coughing or sneezing |
| Local tenderness | Often present in the buttocks | Less typical |
| Back pain | Usually less prominent | More common |
These patterns are useful clues rather than firm rules. Some people may have overlapping problems, and symptoms should not be self-diagnosed. Clinical assessment is important when pain persists or begins to affect normal activities.
What are the treatment options for piriformis syndrome?
Treatment usually follows a stepped approach. Most people begin with conservative care aimed at reducing irritation, restoring comfortable movement and addressing factors that may be overloading the muscle.
Conservative treatment and physiotherapy
Initial treatment may include activity modification, physiotherapy, a gradual return to normal movement and changes to sitting or training habits. Pain-relieving or anti-inflammatory medicines may be suitable for some people, but you should ask your GP or pharmacist whether they are safe for you, particularly if you have other health conditions or take regular medication.
A physiotherapist may recommend:
- Gentle piriformis and hip stretches
- Hip mobility exercises
- Gluteal strengthening
- Core stability work
- Movement and posture retraining
- A gradual return-to-activity programme
Exercises should be tailored to the individual. Aggressive stretching can aggravate nerve irritation in some people, so repeatedly forcing a painful stretch is not recommended. A physiotherapist can help select movements that are appropriate for your symptoms and stage of recovery.
At RAD Clinics, physiotherapy may be recommended for piriformis syndrome and other causes of buttock or sciatic-type pain. Our physiotherapists can assess your symptoms and create a personalised treatment plan, which may include targeted stretches, strengthening exercises, mobility work, posture advice and a gradual return to normal activity. Where appropriate, physiotherapy may also be used alongside imaging or ultrasound-guided treatment as part of a coordinated approach to your care.
Injection treatments for piriformis syndrome
When symptoms continue despite appropriate rehabilitation, an ultrasound-guided injection may be considered. Ultrasound allows the clinician to visualise the piriformis muscle and the nearby sciatic nerve in real time, enabling accurate delivery of medication to the intended area.
A local anaesthetic may be used, sometimes together with a corticosteroid. The aim is to reduce pain and inflammation and, in some cases, provide additional information about whether the piriformis region is the likely source of symptoms. Relief is not guaranteed; the effect may be temporary, and an injection is not suitable for every patient.
At RAD Clinics, we assess you before treatment and explain the procedure, expected benefits, limitations, possible risks and aftercare. Self-referral is available, so a GP referral is not normally required, although we may recommend further medical assessment when another cause needs investigating.
How long does piriformis syndrome last?
Mild symptoms may improve over several weeks with appropriate changes in activity and rehabilitation. Persistent cases may take several months, especially when symptoms have been present for a long time, the nerve remains irritated, or the underlying aggravating factors continue.
Recovery time varies according to symptom severity, general health, activity demands and how consistently the rehabilitation plan can be followed. Improvement is often gradual rather than immediate.
When should you seek medical advice?
Arrange an assessment if the pain:
- Lasts longer than a few weeks
- Is getting worse rather than improving
- Affects your sleep, work, exercise or normal activities
- Has not improved with appropriate conservative treatment
- Is accompanied by increasing numbness or weakness
- Leaves you uncertain whether the symptoms come from the buttock, hip or spine
Seek urgent medical help if you develop severe or rapidly worsening weakness or numbness in both legs, numbness around the genitals or anus, or new difficulty controlling your bladder or bowel. These symptoms may indicate a serious spinal problem rather than piriformis syndrome.
Accessing assessment and treatment at RAD Clinics
RAD Clinics accepts self-referrals for piriformis syndrome assessment and ultrasound-guided injection treatment, so a GP referral is not normally required. Our team aims to make the appointment calm and straightforward, with clear explanations before, during and after the procedure. Where imaging or treatment is appropriate, we provide a detailed report to support the next step in your care.
Service availability can vary between locations. Please contact our team or check the latest information before booking so we can guide you towards the most appropriate clinic and appointment type.
Key takeaways
- Piriformis syndrome may cause deep buttock pain and sciatic-type symptoms in the leg.
- It can resemble sciatica, although the suspected nerve irritation occurs in the buttock rather than at the lower spine.
- No single scan confirms the condition; diagnosis is mainly based on clinical assessment and excluding other causes.
- Physiotherapy, activity changes and gradual rehabilitation are usually the first treatment steps.
- Ultrasound-guided injections may be considered for selected patients with persistent symptoms.
- Concerning neurological, bladder or bowel symptoms require urgent medical assessment.
Common Questions About Piriformis Syndrome
Does physiotherapy help piriformis syndrome?
Physiotherapy is commonly recommended. It may improve mobility, strength, movement patterns and gradual return to activity. The right programme and recovery time vary between patients.
What injection is used for piriformis syndrome?
A local anaesthetic, with or without a corticosteroid, may be injected around the piriformis area under ultrasound guidance after an appropriate assessment.
Do I need a GP referral for a piriformis injection?
RAD Clinics accepts self-referrals. An assessment is still required to decide whether an injection is appropriate and whether another cause of your symptoms should be investigated first.
References
- Külcü DG, et al. Deep Gluteal Syndrome: An Underestimated Cause of Posterior Hip Pain. 2024.
- Hopayian K, et al. A systematic review of conservative and surgical treatments for deep gluteal syndrome. 2023.
- Finnoff JT, et al. Accuracy of ultrasound-guided versus fluoroscopically guided contrast-controlled piriformis injections. 2008.
