High-volume injection for tendinopathy (High-volume image-guided injection for tendinopathy)
An ultrasound-guided injection of a relatively large volume of fluid (usually saline and local anaesthetic, sometimes with a small dose of steroid) around a painful tendon, used as an adjunct for stubborn tendinopathy — with mixed and limited evidence.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- A high-volume injection puts a large volume of fluid (saline, local anaesthetic, sometimes a little steroid) around a stubborn tendon, under ultrasound guidance.
- Evidence is mixed and limited: some short-term benefit in some studies, but a placebo trial found it ineffective without steroid for chronic Achilles tendinopathy.
- It is an adjunct to a loading and rehabilitation programme, which remains the mainstay, not a cure.
- Be cautious of clinics that present it as a guaranteed fix or push repeated paid injections, especially with steroid, near the Achilles.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Done under ultrasound guidance, so the fluid can be placed accurately around the tendon
You have an active infection at or near the site, or are generally unwell.
Expect soreness and possibly a flare of pain at the injected tendon. Use simple pain relief as advised and ease off heavy or aggravating activity.
A clear plan combining the injection with a loading and rehabilitation programme.
Expect soreness and possibly a flare of pain at the injected tendon. Use simple pain relief as advised and ease...
The puncture site and any bruising settle. Many clinicians advise gentle activity and continuing a graded loading...
You build your rehabilitation back up. Any benefit, if it comes, may appear over this period, though it can be...
A reasonable point to review honestly whether it has helped, alongside your loading programme. Benefit is variable...
What is a high-volume injection for tendinopathy?
A high-volume injection (HVI), sometimes called a high-volume image-guided injection, involves injecting a relatively large amount of fluid — usually salt water (saline) and local anaesthetic, and in some recipes a small dose of corticosteroid — into the space around a painful tendon, most often the Achilles or patellar (knee) tendon. It is almost always done under ultrasound guidance.
The theory is that the volume of fluid may help by stripping away tiny abnormal blood vessels and nerves (neovessels) that grow into a damaged tendon and may carry pain. Whether this is why any benefit occurs is uncertain.
HVI is an adjunct — an extra option sometimes considered for a tendon that has not settled with a proper loading and rehabilitation programme — not a first-line treatment, and not a proven cure. The evidence is mixed and limited: some studies suggest short-term benefit (especially when a small dose of steroid is added), while a placebo-controlled trial found high-volume injection without steroid was not effective and could not be recommended for chronic Achilles tendinopathy.
Results vary, and any benefit may be short-lived. This guide explains what to expect and how to judge whether it is being offered responsibly.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
High-volume injection versus other options
| Feature | Loading rehab | High-volume injection |
|---|---|---|
| Role | Mainstay | Adjunct |
| Evidence | Strongest | Mixed / limited |
| Benefit | Slow, durable | Variable, may be short-term |
| Without steroid | — | May be ineffective (Achilles) |
A high-volume injection is added to rehabilitation for stubborn cases, not used instead of it, and is not a proven cure.
Preparing for your procedure
- Tell the clinician your full medical history, including any bleeding problems, blood-thinning medicines, diabetes, infection or skin problems over the area.
- Discuss what rehabilitation you have already tried and for how long, as HVI is meant to follow a proper loading programme.
- Ask whether steroid will be included, and discuss the trade-offs — especially near the Achilles.
- Ask honestly about the evidence for HVI for your tendon and what the plan is if it does not help.
- Plan for the area to be sore for a few days and arrange to ease off heavy activity.
- Arrange transport home if you would prefer not to drive immediately after a lower-limb injection.
What happens
The procedure is done as an outpatient. You stay awake. The skin over the tendon is cleaned, and the clinician uses an ultrasound probe to find the space around the tendon.
Local anaesthetic is given, then a needle is placed under ultrasound guidance into the space between the tendon and its surrounding sheath. A relatively large volume of fluid — saline and local anaesthetic, sometimes with a small dose of steroid — is injected into that space, not into the tendon itself.
The appointment usually takes around 20–30 minutes. There is no surgical wound, only a needle puncture site, which may be sore or bruised for a few days. You can normally go home soon afterwards, and your clinician will advise how to ease back into activity and continue rehabilitation.
Is this procedure right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- You have an active infection at or near the site, or are generally unwell.
- You have a significant bleeding disorder, or take blood thinners that cannot be safely managed.
- Your pain is from a different cause that has not been properly diagnosed.
- You have a tendon already at high risk of rupture, particularly if steroid is being considered near the Achilles.
- You have not yet tried a proper loading and rehabilitation programme, which should normally come first.
Delay or rearrange if…
- You have an active infection anywhere, particularly over the injection site.
- You are pregnant or breastfeeding and this has not been discussed, especially if steroid is involved.
- Your diagnosis is uncertain or has red-flag features that have not been assessed.
- You have recently started a blood thinner or had a change in bleeding risk.
- You are in a severe acute flare where settling it first is more sensible.
Alternatives to discuss
- A progressive loading and rehabilitation programme, which is the mainstay for tendinopathy.
- Other adjuncts such as PRP, prolotherapy or shockwave therapy, each with its own mixed or limited evidence.
- A corticosteroid injection alone in selected cases (with caution, generally avoided near the Achilles).
- Watchful waiting, as many tendinopathies improve with time and rehabilitation.
- Specialist or surgical opinion if a sustained programme has not worked.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Comfort, sedation or contrast choices
If local anaesthetic, sedation, contrast or pain relief is used, ask what is planned, why, and what it means afterwards.
Benefits
- Done under ultrasound guidance, so the fluid can be placed accurately around the tendon
- Avoids the risks of surgery for those wanting to try an injection first
- May reduce pain and improve function in some people, particularly in the short term
- Can be combined with a loading programme rather than replacing it
- Only a minor procedure, usually done as an outpatient with no surgical wound
Risks & complications
- Pain or soreness at and around the injection site for a few days
- A post-injection flare — a temporary worsening of pain
- Bruising at the puncture site
- No clear or lasting benefit, given the mixed and limited evidence
- Stiffness or swelling around the treated tendon for a time
- Feeling faint at the time of the injection
- Needing further treatment without guaranteed benefit
- Infection at the injection site, which can be serious and needs urgent treatment
- Damage to nearby nerves or blood vessels from the needle
- Tendon weakening or rupture, a particular concern where steroid is used in or near the Achilles
High-volume injection is usually low-risk for serious harm, but its main limitation is uncertain and possibly short-lived benefit. The most common issue is a post-injection flare. The use of steroid near the Achilles tendon raises specific concern about weakening and rupture and should be discussed carefully. Choose a clinician who uses ultrasound and sterile technique and who is honest that this is an adjunct, not a cure.
Published figures to discuss
Reported benefit from high-volume injection varies between studies, recipes and tendons, and a placebo-controlled trial found it ineffective without steroid for chronic Achilles tendinopathy. Where steroid is added, early benefit tends to fade. Serious complications are uncommon, but a post-injection flare is a common, expected effect. Precise success or complication rates cannot be quoted reliably, and steroid near a tendon adds rupture concern.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Short-term pain flare | Common | High-volume injection can irritate tissues initially; loading advice is essential afterwards. | Guide sourcesClinical context |
| No durable benefit | Recognised evidence uncertainty | Research findings vary, and benefit depends on tendon site, chronicity, steroid use and rehab. | Guide sourcesClinical context |
| Infection, bleeding or nerve/vessel injury | Rare | Ultrasound guidance and sterile technique reduce risk; anticoagulants and diabetes should be considered. | High-volume injections in Achilles tendinopathy: systematic review — Oxford/BMBacademic.oup.comSource-linked context |
| Tendon overload after pain relief | Avoidable | Pain reduction should not be treated as permission to return immediately to full load. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no surgical recovery — only a needle puncture site. 'Afterwards' is mainly about managing a possible flare of soreness for a few days and continuing your rehabilitation while you see whether any benefit appears.
- Soreness and a possible flare of pain for a few days after the injection
- Bruising at the puncture site
- No immediate or lasting improvement guaranteed
- Being able to do gentle daily activities and, soon, your exercises
- Needing patience while you wait to judge the result
Aftercare
- Continue or start your loading and rehabilitation programme as advised — HVI is an adjunct to this.
- Use simple pain relief for the post-injection flare, following your clinician's advice.
- Ease off heavy or aggravating activity for the first few days, particularly if steroid was used.
- Keep the puncture site clean and watch for signs of infection.
- Attend the review appointment to judge, honestly, whether it has helped.
- Do not assume repeated injections are the answer if the first did not help — discuss this with your clinician.
- Simple pain relief to hand for a possible flare
- Your loading exercise programme to continue alongside
- A note of activities to ease off for a few days (longer if steroid was used)
- A review date to judge benefit
- Awareness of infection and rupture warning signs
- Transport home arranged if needed
- An agreed plan if it does not help
Scars and how they heal
There is no surgical scar. A high-volume injection is given through a needle, leaving a small puncture site that may be a little sore or bruised for a few days and then settles.
⚠ Get urgent help if…
- Spreading redness, heat, swelling, fever or feeling unwell — possible infection, seek urgent help
- Severe or rapidly worsening pain out of proportion to a minor injection
- A sudden snap, severe pain or weakness in the tendon — seek urgent assessment for possible rupture
- New numbness, tingling or weakness beyond the injected area
- A large or expanding bruise or swelling at the site
- Calf pain, swelling, redness or breathlessness — seek urgent help as this can suggest a blood clot
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A good result is reduced pain and improved function, alongside a loading programme. Because the evidence is mixed and limited, some people improve, often in the short term, while others notice little or no benefit, and a high-volume injection cannot be promised to cure a tendon problem.
A placebo-controlled trial found high-volume injection without steroid was not effective for chronic Achilles tendinopathy, and where steroid is added, early benefit tends to fade with time. This is why honest care treats HVI as an option to try, not a certainty, and reviews whether it actually helped.
Any benefit from a high-volume injection is variable and may be short-lived, and symptoms can return — particularly if the underlying overload is not addressed. Keeping up a loading programme and sensible activity gives the best chance of a lasting result. Repeating injections does not guarantee longer-lasting benefit, and repeated steroid near a tendon carries added risk.
Related tests, treatments or support
A high-volume injection is meant to be combined with a progressive loading and rehabilitation programme, which remains the mainstay. It is sometimes discussed alongside other adjuncts; your clinician should explain the options and trade-offs honestly. It should not be sold as a stand-alone fix.
Follow-up & long-term care
You should have a planned review, often around 6 weeks to a few months, to judge honestly whether it has helped alongside your rehabilitation. If it has not, the sensible step is to revisit the diagnosis and overall plan rather than simply repeat the injection. Persistent symptoms may prompt specialist or surgical referral.
- Keep up your loading and strengthening exercises after the injection.
- Increase activity gradually rather than in sudden jumps.
- Address contributing factors such as training load, technique or footwear.
- Return for review rather than assuming repeated injections are the answer if symptoms persist.
Repeat, follow-on and what comes next
- If a single injection does not help, repeating it does not guarantee benefit and the diagnosis and plan should be reviewed.
- Any benefit may be short-lived, and some people are offered repeat injections; this should follow an honest review.
- Persistent symptoms despite injection and rehabilitation may prompt specialist or surgical referral.
- Repeated steroid-containing injections near a tendon are a particular concern and should not be routine.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- A clear plan combining the injection with a loading and rehabilitation programme.
- An honest discussion of whether steroid is used and its risks near the tendon.
- A named contact and a planned, honest review of benefit.
- Clear infection and rupture warning signs and how to seek urgent help.
- A sensible threshold to stop, reconsider the diagnosis, or refer on if it is not helping.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Whether you are charged per injection or for a course
- The number of injections recommended
- That ultrasound guidance is used (and who performs it)
- Whether steroid or other agents are added
- Whether an assessment, imaging and follow-up are included or separate
- Whether rehabilitation/physiotherapy is bundled or extra
- The cost per injection and the total cost if more than one is planned
- That ultrasound guidance is included
- Whether the assessment and any imaging are included
- Whether rehabilitation/physiotherapy is part of the package
- What follow-up or review is included
- The cancellation policy
- What happens, and what it costs, if it does not help or a complication occurs
On the NHS? High-volume injection for tendinopathy is not routinely funded by the NHS and is usually accessed privately or within specialist services; the mainstay treatment remains rehabilitation.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Not being told that the evidence is mixed and limited and that benefit may be short-lived.
- No clear discussion of whether steroid is included and what that means near the Achilles.
- No discussion of alternatives, including rehabilitation and doing nothing.
- High-volume injection presented as a proven cure rather than an adjunct.
- Being committed to a course of injections before rehabilitation has been tried or without a review.
Marketing red flags
- Guaranteeing results or presenting a high-volume injection as a certain fix.
- Selling repeated, expensive injection courses, especially with steroid near the Achilles.
- Downplaying or skipping rehabilitation in favour of injections.
- Not mentioning that a placebo trial found it ineffective without steroid for chronic Achilles tendinopathy.
- Relying on testimonials rather than evidence.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- What is the evidence for a high-volume injection for my specific tendon?
- Have I had a proper loading and rehabilitation programme first?
- Will you include steroid, and what are the risks and benefits of that near my tendon?
- Will you use ultrasound to guide the injection, and how do you keep it sterile?
- How and when will we judge whether it has worked?
- What is the plan if it does not help, and will you avoid simply repeating it?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my procedure, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this procedure not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Does a high-volume injection work?
Why is so much fluid injected?
Is the steroid a problem?
Does it hurt, and is there much recovery?
Can I get it on the NHS?
Is there official UK guidance on this injection?
Do I still need my exercises?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: High-volume injections in Achilles tendinopathy: systematic review — Oxford/BMB High-volume injection for chronic Achilles tendinopathy: RCT — PubMed High-volume injection with/without corticosteroid in Achilles tendinopathy — PubMed Versus Arthritis — Achilles tendinopathy Faculty of Sport and Exercise Medicine UK
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
Related guides: Tendinopathy treatment (tennis elbow, Achilles, patellar) · Platelet-rich plasma (PRP) injection · Prolotherapy · Shockwave therapy (ESWT) · Barbotage for calcific tendinopathy