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Health condition · Clinically reviewed

Ischial bursitis, the deep buttock pain that hurts to sit through.

Weaver's bottom is not a joke to anyone living with it. A calm ladder of activity change, physiotherapy and, when needed, imaging-guided injection settles most cases.

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A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against NICE, BOA and peer-reviewed musculoskeletal sources listed at the end.

  • 03

    Current for 2026

    Reflects current UK musculoskeletal practice, including imaging-guided injection and shockwave options.

Key facts

Ischial bursitis at a glance.

The essentials, in plain English - what it is, who gets it, and how it is treated in the UK today.

  • What it is

    Inflammation of the ischiogluteal bursa - the fluid-filled cushion that sits between the sitting bone and the overlying hamstring tendon.

  • Old name

    Weaver's bottom - a nod to the occupational hazard of long hours on hard seats. Cyclists, rowers and riders see it too.

  • Classic pattern

    Deep buttock pain that worsens the longer you sit and eases the moment you stand. Point tender over the sitting bone.

  • Common overlap

    Frequently coexists with proximal hamstring tendinopathy - the two share anatomy and often need treating together.

  • First-line care

    Activity modification, a firm cushion, analgesia and targeted physiotherapy resolve most cases within weeks.

  • When to escalate

    Imaging-guided steroid injection, shockwave therapy or, rarely, surgery for refractory or septic disease.

Why this guide matters

A calm ladder, not a rush to inject.

Sitting bone pain is often blamed on the hamstring, the disc or the hip - when the bursa itself is the culprit. The three ideas below shape the rest of this page.

  • Load, not damage

    The bursa becomes irritated by repeated compression - most people recover with sensible offloading and progressive rehabilitation.

  • Overlap is the rule

    Ischial bursitis and proximal hamstring tendinopathy sit millimetres apart. Successful care usually treats both, guided by imaging.

  • Injection is a tool, not a cure

    An ultrasound-guided steroid injection can break a cycle, but only when paired with a rehabilitation plan and a plan for the next 12 weeks.

How the diagnosis is made

From first sit down to a clear plan.

The steps a UK GP, physiotherapist or musculoskeletal specialist will normally follow - so you know what to expect and why each stage matters.

  1. 01

    Assessing

    Focused history

    Sitting hours, cycling or rowing mileage, previous falls, hamstring symptoms, gout or inflammatory joint disease.

  2. 02

    Assessing

    Red-flag screen

    Fever, night sweats, unexplained weight loss, bilateral leg weakness or bowel and bladder change - all prompt urgent review.

  3. 03

    Assessing

    Palpation and provocation

    Point tenderness over the ischial tuberosity, reproduced by hamstring stretch and resisted knee flexion in prone.

  4. 04

    Confirming

    Hip and spine examination

    FADIR and FABER for hip pathology, straight-leg raise for sciatica, sacroiliac stress tests and a brief neurological screen.

  5. 05

    Confirming

    Targeted imaging

    Ultrasound is quick and dynamic - MRI adds detail, rules out proximal hamstring tears and shows deep bursal collections.

  6. 06

    Refining

    Specialist musculoskeletal input

    A sports and exercise physician or musculoskeletal radiologist confirms the diagnosis and plans injection if needed.

  7. 07

    Refining

    Rule out septic bursitis

    Hot, swollen, systemically unwell? Aspiration, culture and antibiotics take precedence over any injection.

Typical timeline: a first visit to a settled plan in a couple of weeks, and clear escalation triggers if progress stalls.

What else it could be

The differentials that matter.

Deep buttock pain has a short list of usual suspects. Sorting them out early saves months of the wrong treatment.

Symptoms

What ischial bursitis feels like.

The pattern is usually unmistakable once you know what to ask - a deep, well-localised buttock pain that comes and goes with sitting.

  • Deep buttock pain

    A gnawing ache directly under the sitting bone that patients often localise with one finger.

  • Sitting intolerance

    Pain worsens the longer you sit - hard chairs, car journeys and cycle saddles are the classic triggers.

  • Radiation down the thigh

    A dull referred pain along the back of the thigh, sometimes mistaken for sciatica but rarely below the knee.

  • Point tenderness

    Direct pressure over the ischial tuberosity reproduces the pain - a reliable clinical sign.

  • Hamstring stretch pain

    A slow forward bend or straight-leg raise pulls the hamstring across the bursa and lights it up.

  • Relief on standing

    Standing or walking takes the load off the bursa and dampens the pain within minutes.

  • Occupational and sporting pattern

    Long-haul drivers, office workers, cyclists, rowers and horse riders are over-represented.

  • Red flag - hot, swollen, feverish

    Septic bursitis is rare but urgent - hot, red, tense swelling with fever needs same-day assessment.

Treatment

How ischial bursitis is treated in the UK.

Offloading and physiotherapy first, imaging-guided injection or shockwave next, and surgical review only for the rare refractory case. Related pathways include specialist musculoskeletal physiotherapy, steroid injection and shockwave therapy.

  • Activity modification

    Cut back on prolonged sitting and aggravating training - short standing breaks every 30 minutes make a real difference.

  • Cushioning and posture

    A firm foam or gel cushion with a coccyx cut-out offloads the ischial tuberosity while healing settles.

  • Analgesia and NSAIDs

    A short course of ibuprofen or naproxen with gastric protection calms inflammation - check for contraindications first.

  • Targeted physiotherapy

    Hamstring lengthening, gluteal and core strengthening, and load management under specialist musculoskeletal guidance.

  • Ultrasound-guided injection

    A single image-guided corticosteroid injection into the bursa often breaks the cycle when conservative care stalls.

  • Shockwave therapy

    Extracorporeal shockwave therapy is a selective option for chronic cases, particularly when hamstring tendinopathy coexists.

  • Septic bursitis pathway

    Aspiration, culture-guided antibiotics and, occasionally, surgical drainage - never inject steroid into an infected bursa.

  • Surgical review

    Reserved for refractory bursitis with confirmed proximal hamstring tear - a specialist commissioned pathway, not a first step.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist musculoskeletal society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or musculoskeletal specialist knows your history and examination and can tell you which parts apply to you. If in doubt, get seen.

  • NICE Clinical Knowledge Summaries. Bursitis and hip pain.

  • British Orthopaedic Association (BOA). Standards for musculoskeletal care.

  • British Association of Sport and Exercise Medicine (BASEM). Proximal hamstring tendinopathy consensus.

  • Royal College of Radiologists. Guidance on musculoskeletal ultrasound and MRI.

  • BMJ Best Practice. Assessment of buttock and posterior thigh pain.

Red flags

When sitting bone pain needs urgent attention.

Most cases are mechanical and settle. These are the situations that are not, and where a specialist opinion or urgent review is needed.

  • Fever and systemic upset

    Rigors, malaise or a hot, tense, red swelling raise the possibility of septic bursitis - urgent same-day review.

  • Sudden hamstring pop

    A forceful eccentric injury with immediate pain, bruising and weakness suggests a proximal hamstring tear, not simple bursitis.

  • Saddle numbness or incontinence

    Cauda equina symptoms outweigh any local buttock diagnosis - emergency spinal referral.

  • Progressive weakness

    Foot drop, calf wasting or a positive neurological screen point to nerve root or peripheral nerve pathology.

  • Immunocompromise

    Diabetes, steroid therapy or biologic treatment lower the threshold for imaging and infection screening.

  • Unexplained weight loss

    Persistent, non-mechanical buttock pain with weight loss or night pain warrants imaging to exclude sinister causes.

  • Bilateral symptoms

    Symmetrical buttock and thigh pain, especially with stiffness, prompts thought of inflammatory or metabolic disease.

  • Post-injection flare

    Increasing pain, warmth and swelling in the days after an injection - assess for infection before repeating.

  • Refractory pain

    Persistent symptoms beyond three months of good conservative care deserve a musculoskeletal specialist opinion.

Living with it

A treatable pain, with a clear ladder.

Four things that make the biggest day-to-day difference - sit less, cushion well, train the muscles around the bursa, and know when to escalate.

A quiet reminder

Consistency beats intensity, every time.

Small, steady changes to your sitting, your training and your rehab - kept up for months - do more than any single heroic week.

  1. 01 Sit less

    Break up long sits

    Set a 30-minute reminder to stand, stretch and walk. The bursa recovers with load off, not on.

  2. 02 Cushion

    Sit on the right surface

    A firm cushion with a cut-out under the sitting bone eases pressure at the desk, in the car and in the saddle.

  3. 03 Train smart

    Load, don't hammer

    Progressive hamstring and gluteal loading under a musculoskeletal physiotherapist beats endless stretching.

  4. 04 Know when

    Escalate at three months

    If pain and sitting intolerance persist after 12 weeks of good care, ask for imaging and a specialist opinion.

Frequently asked

Everything we get asked about sitting bone pain.

Quick answers on diagnosis, imaging, injection and when it is safe to return to cycling, rowing or running.

  • What is ischial or sitting bone bursitis?

    Inflammation of the ischiogluteal bursa - the small fluid-filled sac between your sitting bone (ischial tuberosity) and the overlying hamstring tendon. When it is inflamed, sitting compresses the bursa and produces a deep, localised buttock pain often called weaver's bottom.

  • How is it different from a proximal hamstring tear or tendinopathy?

    The two conditions share anatomy and often coexist. Bursitis tends to be worst during prolonged sitting, while hamstring tendinopathy is more provoked by loaded stretch and eccentric work. Ultrasound or MRI is the reliable way to tell them apart, and treatment is often combined.

  • Do I need an MRI or ultrasound?

    Not always. Most cases settle with conservative care alone. Imaging is helpful when the diagnosis is unclear, symptoms persist beyond a few weeks, or you are considering a targeted injection or ruling out a hamstring tear. Ultrasound is quick and dynamic; MRI adds structural detail.

  • Will a steroid injection help?

    An ultrasound-guided corticosteroid injection into the bursa often breaks the cycle of pain when conservative measures stall. It works best combined with a rehabilitation plan and is avoided if there is any suspicion of infection or a full hamstring tendon tear.

  • Can I still cycle or run?

    Short term you may need to swap saddle time for standing cardio, and reduce hamstring loading. As the pain settles, saddle time can be reintroduced gradually with a better cushion, a proper bike fit and a progressive hamstring and gluteal strengthening plan.

  • When should I worry about infection?

    A hot, red, tense swelling over the sitting bone, particularly with fever, malaise or after a skin break, points to septic bursitis. This needs same-day assessment - aspiration, culture and antibiotics take priority, and steroid injection is contraindicated until infection is excluded.

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