Introduction
Shoulder care · Impingement
Shoulder impingement (subacromial impingement)
Dr Sean LeoOrthopaedic Surgeon, Singapore
Clinic enquiries · Not an emergency service
Illustrative image
Most shoulder impingement settles with time and non-surgical care.
Most shoulder impingement settles with time and non-surgical care.
Most shoulder impingement settles with time and non-surgical care.
- Shoulder impingement (subacromial impingement) is a pain pattern that shows up when you lift your arm. A tendon in the shoulder swells and rubs against tissue or bone, and the pain comes as you raise the arm.[2] It can come from irritation, injury or wear and tear, and it usually gets better in a few weeks or months.[2]
- You may have been told you have bone spurs (osteophytes), perhaps after an X-ray. A bone spur is one possible contributor to the crowding. It is not the whole story, and it is common on scans of people who have no shoulder pain at all.[1][9]
- Shoulder pain has more than one possible cause, so the answer comes from assessment, not from a webpage. Weakness, stiffness, general shoulder pain and a shoulder that has come out of joint each have their own pages, linked below.
- OrthoKinetics is Dr Sean Leo’s professional brand. Clinical consultations and treatment are provided through OrthoSports Orthopaedic & Sports Surgery. Dr Sean Leo is a specialist orthopaedic surgeon who cares for shoulder problems.
What’s covered on this webpage
Follow the route in order, or jump to the stop you need. Stops you have read are marked.
A narrow space sits above the shoulder joint.
A narrow space sits above the shoulder joint.
A narrow space sits above the shoulder joint.
The rotator cuff is a group of tendons that attach at the top of the upper arm and connect it to the shoulder blade.[1] Above it sits a bony structure on top of the shoulder blade, called the acromion.[1]
Between the rotator cuff and the acromion there is a lubricating sac called a bursa. The bursa allows the rotator cuff tendons to glide smoothly when you move your arm.[1] That narrow, cushioned space is where impingement happens.
The problem happens when the space above the joint narrows.
The problem happens when the space above the joint narrows.
The problem happens when the space above the joint narrows.
The traditional explanation is that the space between the top of your shoulder (the acromion) and the rotator cuff tendons becomes smaller when you raise your arm. The acromion can then rub against the tendon and the bursa below, causing irritation and pain.[1] That is the classic description of impingement. Newer research questions whether this mechanical theory is the whole picture, so read it as an explanation, not a proven mechanism.[5]
Clinicians increasingly use the terms “subacromial pain” or “subacromial pain syndrome” for this same problem, and there is no single agreed name.[8][5][7]
Where bone spurs fit in
A bone spur (osteophyte) is a small bony outgrowth. On a plain X-ray, a shoulder with rotator cuff pain is usually normal or may show a small bone spur.[1] Imaging findings of this kind, in the joint on top of the shoulder and the space beneath it, are common in people without any symptoms. That is why a finding on a scan should be linked to pain with caution.[9]
In a trial that used placebo surgery as the comparison, removing bone spurs and soft tissue conferred no clear added benefit.[3] So a spur is one finding for your clinician to weigh. It is not a confirmed cause, and removing it is not a promise of relief.
It usually feels like pain when reaching overhead.
It usually feels like pain when reaching overhead.
It usually feels like pain when reaching overhead.
The typical pattern is pain at the top and the outside of the shoulder.[2] It is worse when you lift your arm, especially above your head, and it may be worse at night.[2] The pain is typically at its worst at night.[1] Some people also notice weakness in the arm.[2] Early on, the pain may be mild or come on only with specific movements.[1]
These are useful clues for assessment. They do not confirm which structure is responsible, because there are other possible causes of shoulder pain that have similar symptoms.[2] Shoulder pain can also come from the neck.[1]
If weakness is the main problem, the rotator cuff tear page covers tears. If stiffness and lost movement stand out, see the frozen shoulder (adhesive capsulitis) page. If the shoulder has come out of joint or feels unstable, see the shoulder dislocation page. For pain that is spread out and hard to place, start with the shoulder pain page.
When should I get shoulder pain assessed
When should I get shoulder pain assessed
When should I get shoulder pain assessed?
Managing a sore shoulder yourself for a while is common. Pain that keeps coming back, is getting worse, or limits your work, overhead activity or sleep despite basic self-care is a reasonable reason to be assessed. So is simply not knowing what is causing it.
A sudden, severe injury, for example after a fall, is a reason to be seen promptly. It belongs to the urgent-care route, not to this webpage.
Some signs mean a shoulder should be seen urgently rather than at a routine appointment. Those signs are listed under Final next step at the end of this page.
Safety note: This webpage is not an emergency service. No list on this page can rule out a serious problem remotely.
Assessment starts with the story and an examination.
Assessment starts with the story and an examination.
Assessment starts with the story and an examination.
After discussing your symptoms and medical history, your doctor will examine your shoulder. This includes pressing on different parts to see whether any area is tender, asking you to move your arm in several directions to check your motion, and testing your arm strength.[1]
Imaging is used selectively. X-rays show bone but not soft tissue, so a normal X-ray does not rule out a soft-tissue problem.[1] MRI or ultrasound can show the rotator cuff tendons and the bursa.[1] Imaging is used judiciously, mainly to confirm a specific clinical suspicion or to exclude a serious condition.[9]
A scan supports the assessment. It does not replace the history and examination, and a finding on it, including a bone spur, does not decide treatment by itself.[9]
Non-surgical care is the usual first step.
Non-surgical care is the usual first step.
Non-surgical care is the usual first step.
In most cases, initial treatment is non-surgical.[1] That usually means rest and activity modification, such as avoiding the overhead activities that tend to cause your symptoms, anti-inflammatory medication, and physiotherapy to restore movement and then build strength.[1] Stretching exercises to improve motion are very helpful.[1]
Rest here means relative rest. Follow any exercises from your GP or physiotherapist as early as you can, and do not stop moving your shoulder completely, because that can stop it getting better.[2]
Many people experience a gradual improvement and return to function, although complete recovery may take several weeks to months.[1]
If rest, medicines and physiotherapy do not help your pain, an injection of a local anaesthetic and steroid into the bursa beneath the acromion may be offered.[1] Steroid injections may relieve pain if rest and exercises do not help on their own.[2] That is the most that can be said. An injection is not a cure and it does not come with a promised result.
When is surgery considered?
When is surgery considered?
When is surgery considered?
Non-surgical care comes first.[1] For some people, pain continues after it. That is when the question of surgery comes up.
The evidence here is mixed, and it helps to see it plainly.
- Some sources still describe surgery as an option when non-surgical treatment does not relieve the pain.[1]
- Trials have questioned how much the operation adds. Two placebo-surgery-controlled trials, CSAW and FIMPACT, found that arthroscopic subacromial decompression provided no benefit over placebo surgery or exercise therapy, with follow-up to 10 years in FIMPACT.[3][4][5][6]
- A BMJ clinical practice guideline makes a strong recommendation against subacromial decompression surgery for adults with shoulder pain of more than 3 months. It does not apply to traumatic shoulder pain or to other diagnoses.[7]
Whether surgery has a role in your shoulder is an individual decision, made with your surgeon after examination. It is not an automatic next step, and this page does not tell you which way to go.
The trials in more detail
In CSAW, the shoulder score did not differ between decompression and arthroscopy alone at 6 months, and both groups were only slightly better than no treatment, a difference that was not clinically important.[3] In FIMPACT, decompression provided no benefit over diagnostic arthroscopy at 24 months, or over exercise therapy at 5 years.[4][5] At 10 years, it offered no benefit over placebo surgery or exercise therapy.[6]
These trials involved adults whose pain had lasted more than 3 months.[3][4] They describe groups of people, not what will happen to you.
Structure / Patient / Goal
Structure / Patient / Goal
Deciding together
Structure / Patient / Goal
S
Structure: what is affected?
Structure is what is affected: the space above the joint, the tendons and bursa, and any bone spur seen on imaging.
P
Patient: how does it affect you?
Patient means you as a whole person. Your symptoms, how active you are, your general health, your preferences and your circumstances all shape which options are reasonable.
G
Goal: what are you hoping to return to?
Goal is what matters to you, whether that is reaching and lifting in daily life, work above shoulder height or sport. A useful plan starts from a clear purpose.
Your plan
No single factor decides treatment alone, and no single scan finding does either.
Surgery aims to open the space above the joint.
Surgery aims to open the space above the joint.
Surgery aims to open the space above the joint.
The goal of surgery is to create more space for the rotator cuff.[1] It does this by removing the inflamed portion of the bursa, a procedure called bursectomy, and removing any bone spurs on the acromion, a procedure called acromioplasty, also known as subacromial decompression.[1] It is usually done arthroscopically (keyhole).[1]
That describes what the operation aims to do. It is not a promise of relief, and the section on when surgery is considered sets out what the trials found.[3][4][5][6]
Recovery is gradual, usually over weeks to months.
Recovery is gradual, usually over weeks to months.
Recovery
Recovery is gradual, usually over weeks to months.
Without surgery, impingement usually gets better in a few weeks or months.[2] AAOS describes gradual improvement, with complete recovery taking several weeks to months.[1]
After surgery, it typically takes 2 to 4 months to achieve complete relief of pain, but it may take up to 1 year.[1] Guideline material notes that recovery time varies from months to years and may include sick leave.[7]
These are ranges, not promises. Recovery is judged by how the shoulder responds, not by the calendar, and your clinician can tell you what to expect for your own shoulder.
Risks and complications
Risks and complications
Risks and complications
Both paths have real limits, and it is better to know them before you decide.
Surgery. A BMJ guideline panel concluded that almost all informed patients would choose to avoid surgery for this indication because there is no benefit but there are harms and it is burdensome.[7] Frozen shoulder may be more common with surgery.[7] The frozen shoulder page explains that condition. Recovery after surgery can also be prolonged, as the ranges above show.[1][7]
Non-surgical care. It asks for time and steady effort. Complete recovery may take several weeks to months.[1]
Before you decide. Your surgeon can go through the risks that apply to your shoulder and your health.
OrthoKinetics Recovery Reflection
Recovery reflection
If resting the shoulder completely is not the answer either, what is the shoulder asking you to change?
A sore shoulder can seem to offer two choices: stop using it, or carry on regardless. The guidance is neither. Avoiding the overhead activities that bring on the pain is one part, and not stopping the shoulder moving completely is the other.[1][2] The choice is not between stillness and effort. It is about which movements to adjust, and which to keep.
What would it mean to treat a hard day as information about which movement to adjust, rather than a sign the shoulder is failing?
It might mean noticing that lifting something to a high shelf is what stirs the pain, while reaching forward at desk height is comfortable. Nothing about that is a setback. It is a clue about where to change the load, and it belongs to you to notice.
A shoulder that is settling still asks for movement, only a different kind. Adjusting what you ask of it is not giving up, and it is part of how gradual recovery happens.
Illustrative image
With you through the seasonsMeet Dr Sean Leo
Meet Dr Sean Leo
A consultant orthopaedic surgeon whose clinical focus is the knee, sports injuries and the lower limb.
- Dr Sean Leo is a consultant orthopaedic surgeon. OrthoKinetics is his professional brand; clinical services are provided through OrthoSports Orthopaedic & Sports Surgery at Mount Elizabeth Novena Specialist Centre and Connexion, Farrer Park Hospital.
- His clinical interests include sports injuries, including those in adolescent athletes; ligament reconstruction; realignment surgery; cartilage repair and joint-preservation approaches; knee replacement; and technology-assisted hip and knee surgery.
- The consistent aim is to return people to meaningful function and activity while avoiding unnecessary downtime.
- Qualifications: MBBS, MRCS (Ed), MMed (Ortho), FRCSEd (Ortho).
More detail: Meet Dr Sean Leo
- Training and career: Dr Leo trained in medicine at the National University of Singapore and served in the Singapore Armed Forces Medical Corps from 2000 to 2012, where his work included the care of soldiers in physically demanding roles. He completed postgraduate orthopaedic training in 2009 and a one-year clinical fellowship at Royal North Shore Hospital in Sydney, Australia, before joining Changi General Hospital as an orthopaedic consultant in 2012, where he later held the positions of Senior Consultant and Director of the Hip and Knee Service. With seniority, his educational contribution has evolved towards mentorship and support for junior doctors.
Questions people often ask
Common shoulder impingement questions
Common shoulder impingement questions
What is shoulder impingement (subacromial impingement)?
Shoulder impingement (subacromial impingement) is where a tendon inside the shoulder swells and rubs against tissue or bone, causing pain as you lift your arm. It can come from irritation, injury or wear and tear, and it usually gets better in a few weeks or months. A bone spur is one possible contributor, not the whole story.[1][2][9]
Is my bone spur actually shoulder impingement?
Not necessarily. A bone spur is a common finding on shoulder X-rays, and imaging findings like it are common in people without symptoms. So a spur alone does not tell you what is causing the pain, and it does not decide treatment. Assessment weighs the spur alongside your symptoms and examination.[1][9]
Why does my shoulder hurt when I reach overhead or lie on it?
The typical pattern is pain at the top and outside of the shoulder that is worse when you lift your arm, especially above your head, and often worst at night. Other shoulder problems can feel similar, so the pattern is a clue for assessment, not a diagnosis.[1][2]
Do I need surgery, or will exercises work?
Non-surgical care comes first, including physiotherapy and activity changes. Trials have questioned how much decompression surgery adds beyond placebo surgery or exercise therapy, although some sources still describe it as an option when non-surgical care has not relieved the pain. The decision is individual and made with your surgeon.[1][3][4][5][6]
Will removing the bone spur cure the pain?
There is no promise that it will. In a trial that used placebo surgery as the comparison, removing bone spurs and soft tissue conferred no clear added benefit. A spur is one finding among several, and whether any operation suits your shoulder is decided with your surgeon after assessment.[3]
Do I need an MRI for shoulder impingement?
Not always. X-rays show bone but not soft tissue, and MRI or ultrasound can show the tendons and bursa. Imaging is used judiciously, mainly to confirm a specific clinical suspicion or to exclude a serious condition, and it supports the examination rather than replacing it.[1][9]
How long does shoulder impingement take to settle?
There is no fixed date. Shoulder impingement usually gets better in a few weeks or months without surgery, and complete recovery can take several weeks to months. After surgery, complete pain relief typically takes 2 to 4 months but may take up to a year.[1][2]
Is shoulder impingement the same as a rotator cuff tear or frozen shoulder?
No, though symptoms can overlap. There are other possible causes of shoulder pain that have similar symptoms, so assessment is what tells them apart. Tears, and stiffness with lost movement, have their own pages: rotator cuff tear and frozen shoulder (adhesive capsulitis).[2]
Can shoulder impingement settle without surgery?
In most cases initial treatment is non-surgical, and many people experience gradual improvement and return to function, although complete recovery may take several weeks to months. Following prescribed exercises early, and not stopping the shoulder moving completely, are part of that care. Your clinician can advise on your own shoulder.[1][2]
Should I see a doctor, or wait and see?
Pain that keeps coming back, is getting worse, or limits your work, overhead activity or sleep is a reasonable reason to be assessed. Assessment includes your history and an examination. Signs that need urgent help are listed under Final next step.[1]
Costs and insurance
Costs and insurance
Practicalities
Cost, Medisave and insurance
Ask the clinic team for current information about fees, panel status, pre-authorisation and expected payment arrangements. Insurance coverage and out-of-pocket costs depend on the individual policy and the insurer’s decision; no coverage is guaranteed.
A cost estimate for surgery can be given only after a consultation and assessment, once a surgical plan has been developed. Each individual condition is unique — implants used, time taken, and other factors contribute to the overall estimate. The estimate will be provided to you by the clinic should you decide on surgical management, and will also be used to assist in obtaining pre-authorisation from insurance where applicable.
Insurance panels. Dr Sean Leo, Orthopaedic Surgeon, is on the specialist panels of Great Eastern (GE Panel), HSBC Life (HSBC Life Shield) and Singlife (Singlife Shield), and on the Prudential Panel. AXA Insurance Singapore became part of HSBC Life in 2023, and former AXA Shield plans are now HSBC Life Shield plans.
Corporate health plans. Dr Leo is on the panels of both Alliance Medinet and iXchange, which administer medical benefits for many company health plans. If your company plan uses either panel, you can see Dr Leo as a panel doctor.
If your company uses a different panel. Some company plans still let you see a doctor of your choice outside their panel, then claim reimbursement. This varies from plan to plan, as may the co-payment, so please check your benefits with your company’s HR department.
Panel arrangements change from time to time, so please confirm with your insurer or your company’s plan administrator before your appointment.
Dr Leo is on the panels shown. If your insurer is not listed, you may ask whether co-management with an Orthosports surgeon partner on that panel is clinically and administratively appropriate. Orthosports surgeon partners are collectively on the panels of all Shield plans.
Specific benefits, pre-authorisation, reimbursement and cashless treatment depend on the individual policy and insurer approval and are not guaranteed.
Arrange a consultation: the appointment section is further down this page.
Sources
References
References
- American Academy of Orthopaedic Surgeons (AAOS). Shoulder Impingement/Rotator Cuff Tendinitis. OrthoInfo. Available at: https://www.orthoinfo.org/diseases–conditions/shoulder-impingementrotator-cuff-tendinitis
- NHS. Shoulder impingement (page last reviewed 26 November 2024). Available at: https://www.nhs.uk/conditions/shoulder-impingement-syndrome/
- Beard DJ, Rees JL, Cook JA, et al.; CSAW Study Group. Arthroscopic subacromial decompression for subacromial shoulder pain (CSAW): a multicentre, pragmatic, parallel group, placebo-controlled, three-group, randomised surgical trial. Lancet. 2018;391(10118):329-338. doi:10.1016/S0140-6736(17)32457-1. PMID 29169668. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC5803129/
- Paavola M, Malmivaara A, Taimela S, Kanto K, Inkinen J, Kalske J, et al.; FIMPACT Investigators. Subacromial decompression versus diagnostic arthroscopy for shoulder impingement: randomised, placebo surgery controlled clinical trial. BMJ. 2018;362:k2860. doi:10.1136/bmj.k2860. Available at: https://www.bmj.com/content/362/bmj.k2860
- Paavola M, Kanto K, Ranstam J, et al. Subacromial decompression versus diagnostic arthroscopy for shoulder impingement: a 5-year follow-up of a randomised, placebo surgery controlled clinical trial. Br J Sports Med. 2021;55(2):99-107. Available at: https://bjsm.bmj.com/content/55/2/99
- FIMPACT Investigators. Arthroscopic subacromial decompression versus placebo surgery for subacromial pain syndrome: 10 year follow-up of the FIMPACT randomised, placebo surgery controlled trial. BMJ. 2025;391:bmj-2025-086201. Available at: https://www.bmj.com/content/391/bmj-2025-086201
- Vandvik PO, Lähdeoja T, Ardern C, Buchbinder R, et al. Subacromial decompression surgery for adults with shoulder pain: a clinical practice guideline. BMJ. 2019;364:l294. doi:10.1136/bmj.l294. Available at: https://www.bmj.com/content/364/bmj.l294
- Witten A, Mikkelsen K, Wagenblast Mayntzhusen T, Clausen MB, Thorborg K, Hölmich P, Barfod KW. Terminology and diagnostic criteria used in studies investigating patients with subacromial pain syndrome from 1972 to 2019: a scoping review. Br J Sports Med. 2023;57(13):864-871. doi:10.1136/bjsports-2022-106340. PMID 36813537. Available at: https://pubmed.ncbi.nlm.nih.gov/36813537/
- Imaging abnormalities of the acromioclavicular joint and subacromial space are common in asymptomatic shoulders: a systematic review (SCRUTINY). J Orthop Surg Res. 2024. doi:10.1186/s13018-024-05378-4. PMID 39754140. Available at: https://pubmed.ncbi.nlm.nih.gov/39754140/
Final next step
Final next step
Next step
Final next step
Reading about a problem is a starting point. An assessment brings together the history, an examination where needed and any useful tests, and helps you and your clinician decide what to do next. How much physical examination is needed is a matter of clinical judgement. It may be limited when pain makes an examination unreliable, or when imaging clearly shows a problem that matches the symptoms, such as a fracture seen on an X-ray or an MRI scan that clearly shows an injury consistent with the symptoms. The Singapore Medical Council and the UK General Medical Council both allow remote medical consultations, where a physical examination is not possible, with safeguards: the doctor must be clear about the limits of an opinion formed without an examination, and whether an in-person examination is needed, or referral to other services, is left to the clinical judgement of the attending doctor.
Signs that need urgent help
Some symptoms should not wait for a routine appointment. Each item below says where to go.
After an injury
- After a fall or other injury, the shoulder looks out of place or has changed shape, you cannot move your arm, or the shoulder is painful, bruised or swollen. Go to an emergency department or call 995.
- After an injury, the arm or hand is numb, tingling, cool to the touch, or has turned white or purple. Go to an emergency department or call 995.
- After a fall, you have intense pain, a snapping feeling and sudden weakness in your upper arm. Arrange a prompt assessment.
At any time
- A joint, such as the shoulder, is suddenly very painful, hot, red and swollen (redness may be harder to see on darker skin), especially with a fever or feeling generally unwell. Go to an emergency department or call 995.
- You have chest pain that feels tight or like squeezing, or chest pain that spreads to your arm, neck or jaw, or you have severe difficulty breathing. Go to an emergency department or call 995.
- Your shoulder symptoms come with fever, night sweats or weight loss. Arrange an urgent same-day assessment.
If you are admitted by the doctor at the urgent care centre of one of these private hospitals, the Parkway Pantai hospitals (Mount Elizabeth Orchard, Mount Elizabeth Novena, Gleneagles and Parkway East), Farrer Park Hospital and Thomson Medical Centre, you may ask for Dr Sean Leo to be your attending orthopaedic surgeon. If you are instead discharged and referred for orthopaedic follow-up, you may contact the clinic to arrange an appointment. Both are subject to the hospital’s admission processes and to Dr Leo’s availability.
Was this page helpful?
Arrange a consultation
Appointments are arranged through the OrthoSports clinic team. Send your details below, or message or call the clinic.
Leave your details and the clinic team will reply to arrange a time.
Message the clinic on WhatsApp
-
38 Irrawaddy Road, #10-41 Mount Elizabeth Novena Specialist Centre, Singapore 329563 Map for Orthosports@Novena (opens Google Maps)
-
1 Farrer Park Station Road, #15-17 Connexion, Singapore 217562 Map for Orthosports@Connexion (opens Google Maps)
WhatsApp is for clinic enquiries only. It is not an emergency service and is not monitored for urgent care. Website or messaging contact is not an emergency-response service. For a medical emergency, use your local emergency service.
- OrthoKinetics does not provide emergency or urgent care through this webpage or its WhatsApp contact.