Bursitis
Persistent tendon pain isn’t a weakness problem. It’s a capacity problem
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Bursitis is inflammation or irritation of a bursa — a small fluid-filled sac that sits between tissues to reduce friction as you move. When a bursa becomes irritated it can swell, become painful, and make simple movements feel sharp, achy, or restricted.
Bursitis is common around the shoulder, hip, elbow and knee. It can come on after a knock, a period of repetitive loading, prolonged pressure (kneeling / leaning), or as part of a broader overload picture involving tendons and movement mechanics.
This page explains what bursae do, why bursitis happens, the most common presentations I see, how we distinguish it from tendon or ligament problems, and what tends to settle it properly:
What Is A Bursa?
A bursa is a synovial-lined sac that acts as a cushion and a low-friction glide point between structures that move against each other — tendon over bone, skin over bone, muscle over bone. You have well over 100 bursae in the body, although most are small and rarely cause issues.
Structurally, a bursa contains a thin synovial membrane and a small amount of fluid. That fluid allows adjacent tissues to slide smoothly rather than rub directly. In high-movement areas such as the shoulder, hip, knee and elbow, this friction-reducing role is particularly important.
Most of the time you never notice them because they’re doing exactly what they’re designed to do: reducing friction quietly and efficiently in the background.
A bursa becomes a problem when it is irritated repeatedly or compressed for long periods. That irritation may come from repetitive movement, prolonged pressure, direct trauma, or altered movement mechanics that increase compression in a specific range.
When irritated, the synovial lining can thicken and produce excess fluid. The sac may enlarge slightly. Surrounding tissues may become more sensitive. It is not always dramatic swelling — sometimes it is subtle — but the local tissue environment becomes more reactive.
In many cases, the pain is less about structural damage and more about sensitivity. The bursa is designed to glide. When it becomes inflamed or thickened, that smooth gliding is disrupted, and compression that was previously tolerated becomes provocative.
Understanding that helps frame treatment properly. The aim is not just to “reduce inflammation” — it is to remove the repeated irritant and restore smooth movement around the area.
What Bursitis Feels Like
Bursitis is usually quite local.
Most people can place one finger directly over the painful spot. It tends to feel superficial rather than deep inside the joint. The sensation often includes:
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A dull ache at rest
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A sharper “pinch” in certain positions
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Local tenderness when pressing directly on the area
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Discomfort when lying on it
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Increased pain with compression rather than pure movement
In early stages, it may feel mildly irritated — noticeable but manageable. As sensitivity increases, even light pressure can become uncomfortable.
For example:
With lateral hip bursitis, people often say,
“It’s fine walking short distances, but I can’t lie on that side.”
With shoulder bursitis,
“It catches when I reach overhead or behind my back.”
With elbow bursitis,
“It’s sore when I lean on it — and it looks swollen.”
That positional sensitivity is important. Bursitis is often aggravated more by compression than by pure force production.
The Pain Pattern
Unlike tendon pain, which often follows a clear load-related pattern (worse with repeated effort, stiff the next morning), bursitis frequently reacts more to position and pressure. Unlike ligament injuries, there is rarely a sense of instability or “giving way.” Unlike arthritis, the pain is usually well-localised and not associated with deep stiffness across the whole joint.
The area may feel:
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Warm
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Slightly swollen
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Puffy or thickened
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Sensitive to direct touch
In superficial bursitis (such as elbow or knee), swelling can be visibly obvious. In deeper bursae (such as the shoulder or hip), swelling is not usually visible but compression reproduces symptoms clearly.
Acute vs Persistent Presentations
In acute bursitis (often after trauma), swelling may develop quickly. The area can feel tight and inflamed. In more persistent cases, the pain is often more position-dependent. It may fluctuate depending on activity levels and sleeping positions.
Many people describe it as:
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“It’s fine until I do that one movement.”
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“It aches at night.”
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“It’s not weak — it’s just sore in that spot.”
That last comment is particularly common. Strength often feels relatively normal in basic tasks. The discomfort is more about irritation than loss of power.
When It Feels Different
If pain is:
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Rapidly worsening
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Accompanied by spreading redness
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Associated with fever
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Extremely tender to light touch
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Causing significant swelling that is increasing
that raises concern for infection and needs medical review.
A Useful Way to Think About It
Bursitis often feels like a sore cushion being repeatedly pressed. If the cushion is irritated, pressing it hurts. If you stop pressing it, it settles. If you keep pressing it, it stays reactive. The key question is always:
What keeps pressing on it?
That’s where assessment becomes important.
Why Bursitis Develops
Bursitis is rarely random.
In most cases, it develops because the bursa is being exposed to irritation that exceeds its tolerance. That irritation may be mechanical, positional, metabolic, inflammatory, or — less commonly — infectious. Often, more than one factor is involved.
Understanding what is driving it is the difference between short-term relief and durable resolution.
Mechanical Overload and Repetitive Friction
Many bursae sit between a tendon and a bone. If the tendon is working harder than usual — because of increased training volume, reduced recovery, weakness elsewhere, or altered movement mechanics — compressive force across the bursa increases.
Over time, the bursa reacts.
This is why shoulder bursitis often sits alongside rotator cuff overload. The tendon becomes sensitive first, movement subtly alters, and the bursa begins to experience greater compression during elevation.
It is also why lateral hip “bursitis” frequently overlaps with gluteal tendon irritation. If the gluteal tendons are not tolerating load well, compression over the greater trochanter increases and the bursa becomes reactive.
In these situations, the bursa is not necessarily the original problem. It is the tissue that complains.
Prolonged Direct Pressure
Some bursae lie superficially and are vulnerable to sustained compression. Common examples include:
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Olecranon bursitis from leaning on the elbow
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Prepatellar bursitis from prolonged kneeling
In these cases, the irritant is obvious. Sustained pressure disrupts normal gliding and stimulates fluid production within the sac. Remove the pressure consistently and many of these cases settle well. Continue the mechanical irritation and they tend to persist.
Trauma
A direct blow can irritate a bursa rapidly. The inflammatory response increases fluid production and local swelling. This presentation is often more acute and visually obvious.
Most traumatic bursitis improves with appropriate management. However, repeated minor trauma can convert an acute presentation into a chronic one.
Compression in Specific Positions
Sometimes bursitis is not about overall volume of movement, but about position. Certain joint angles increase compressive force across a bursa.
For example:
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In greater trochanteric pain presentations, side-lying with the hip adducted significantly increases compression across the lateral hip structures.
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In the shoulder, sustained overhead or end-range positions increase subacromial compression.
In these cases, it is not just “doing too much.” It is repeatedly loading the structure in a way that increases compression beyond tolerance. Modify the position, and symptoms often improve quickly.
Metabolic and Hormonal Influences
Not all drivers are mechanical. Metabolic conditions such as diabetes influence connective tissue behaviour. Elevated blood glucose alters collagen quality, impairs healing capacity and increases low-grade inflammation. This can lower tissue tolerance and slow resolution.
Hormonal changes also influence connective tissue resilience. Oestrogen fluctuations, perimenopause and menopause are associated with altered tendon and soft tissue behaviour. While hormones do not directly cause bursitis, they can modify the threshold at which tissue becomes reactive.
The mechanical load may be the same. The tolerance may be different.
Inflammatory and Autoimmune Conditions
Certain inflammatory conditions can involve bursae as part of a broader systemic process. Rheumatoid arthritis, gout and other inflammatory arthropathies may cause bursal inflammation independent of mechanical overload.
These cases often present differently and require medical co-management rather than purely mechanical rehabilitation.
Infection (Septic Bursitis)
Infection is uncommon but clinically important. Superficial bursae — particularly at the elbow and knee — are vulnerable if there is skin breakdown or repeated pressure. Risk increases in individuals with diabetes or compromised immune function.
Septic bursitis typically presents with:
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Increasing redness
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Heat
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Progressive swelling
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Marked tenderness
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Sometimes fever or systemic symptoms
This is not a load-management problem. It requires urgent medical assessment.
The Bigger Picture
In clinical practice, many cases labelled “bursitis” sit within a broader mechanical pattern. If surrounding muscles are weak, poorly coordinated, or fatigued, if load increases too quickly, or if joint control is suboptimal, the bursa becomes the structure absorbing the consequence.
That is why treatment focused solely on calming inflammation without addressing:
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Load management
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Movement control
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Strength deficits
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Compression mechanics
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Systemic contributors
often leads to recurrence. The bursa is reacting. The driver must be identified.
How Bursitis Is Diagnosed
In most cases, bursitis is diagnosed clinically. The location of pain, its behaviour, and the way it responds to compression usually provide the answer. A clearly localised tender point over a known bursa, particularly if aggravated by pressure or specific joint positions, strongly suggests bursal irritation.
The key part of assessment is not simply confirming that a bursa is irritated — it is identifying why.
We ask:
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Is this primarily compression-driven?
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Is it part of a tendon overload picture?
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Is there a recent trauma history?
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Are systemic factors contributing?
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Is infection a possibility?
Imaging is not always necessary. Many cases can be managed effectively based on clinical assessment alone. When imaging is used, ultrasound is often helpful because bursae are superficial structures and fluid or thickening can be visualised clearly.
However, imaging findings must always be interpreted alongside symptoms. Fluid alone does not automatically equal pain.
Treatment Principles in Bursitis
Treatment always depends on what is driving the irritation — but the core principles remain consistent. The goal is not simply to “reduce inflammation.”
It is to remove the repeated irritant, restore normal tissue tolerance, and prevent recurrence.
1. Reduce the Irritant — Precisely, Not Globally
If the bursa is being repeatedly compressed or irritated, that specific stress must be modified. This might mean:
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Avoiding prolonged kneeling in prepatellar bursitis
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Reducing leaning through the elbow in olecranon bursitis
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Modifying side-lying posture in lateral hip pain
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Temporarily reducing overhead loading in shoulder irritation
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Adjusting training volume or surface exposure
But this is not blanket rest.
Complete avoidance of movement for weeks often increases sensitivity long-term. Tissues become deconditioned. The nervous system becomes more protective. Capacity drops. Instead, the aim is targeted unloading. We remove or reduce the specific compressive or provocative position while keeping the joint moving comfortably in other ranges.
For example:
In lateral hip pain, we may temporarily reduce side-lying compression and long-stride hill walking, but continue controlled strengthening in neutral hip positions.
In shoulder bursitis, we may reduce repetitive overhead work but maintain pain-free range and cuff activation.
This is strategic modification — not withdrawal from activity.
2. Address the Mechanical Driver
In many cases, bursitis is the consequence rather than the root cause.
If a tendon is overloaded, if movement control is poor, if strength is insufficient, or if load progression has been too rapid, the bursa absorbs the consequence. Calming symptoms without correcting the driver often leads to recurrence.
That means looking at:
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How load has increased
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Whether recovery has been adequate
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Whether surrounding muscles are functioning optimally
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Whether joint alignment is efficient under stress
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Whether compressive positions are habitual
For example:
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If gluteal strength is insufficient, lateral hip compression increases during gait.
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If rotator cuff control is poor, subacromial compression increases during elevation.
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If knee mechanics collapse dynamically, anterior knee structures are overloaded.
In these cases, rehabilitation must include:
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Progressive strengthening
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Movement retraining
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Load management
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Proprioceptive control work
Without that, symptom suppression alone is rarely durable.
3. Graduated Return to Load
Once irritability reduces, exposure must increase gradually. Avoiding the aggravating activity indefinitely does not solve the problem. It simply avoids it.
Tissues adapt to load. If load is removed entirely, tolerance drops. When the activity is reintroduced suddenly, the bursa reacts again.
Instead, load should be reintroduced in a graded manner:
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Controlled range before end-range
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Slower tempo before speed
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Lower volume before higher volume
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Predictable before unpredictable
For example:
A patient with shoulder bursitis might progress from supported elevation drills to light resistance overhead work before returning to repetitive overhead sport.
A patient with prepatellar bursitis may progress from avoiding kneeling to short-duration kneeling on cushioning before returning to full occupational exposure.
The aim is not permanent avoidance. It is restored tolerance.
4. Medication and Injection — Where They Fit
Short-term anti-inflammatory medication can reduce acute irritation and make early movement more tolerable. However, most mechanical bursitis is not purely inflammatory in the systemic sense. Medication may settle symptoms but does not address compressive mechanics or strength deficits.
Corticosteroid injection may be considered in persistent, significantly inflamed cases where pain is preventing rehabilitation. It can reduce local inflammatory response and allow movement to resume.
But injection does not correct:
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Poor load progression
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Weakness
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Movement inefficiency
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Habitual compression
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Without rehabilitation, recurrence risk remains. Injection should create an opportunity to rehabilitate properly — not replace rehabilitation.
When Bursitis Is Not “Just Bursitis”
This section is critical for safety. Most bursitis is mechanical and self-limiting with appropriate management. However, certain features suggest something more serious.
Seek medical assessment urgently if there is:
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Rapidly increasing redness and heat
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Significant swelling developing over hours or days
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Fever or systemic symptoms
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Severe tenderness with skin sensitivity
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Progressive worsening despite rest
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A history of diabetes or immune compromise
These features may indicate septic bursitis. This is not a mechanical issue and requires medical evaluation, often including aspiration and antibiotics.
Similarly, pain that is:
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Constant and unrelated to movement
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Waking you persistently at night without positional trigger
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Associated with unexplained weight loss or systemic symptoms
requires further assessment. Bursitis should behave mechanically. If it does not, it should be investigated.
Summary
A bursa is a friction-reducing cushion that allows tissues to glide smoothly around joints. When it becomes irritated — through repeated compression, overload, direct pressure, trauma, or occasionally systemic factors — it becomes sensitive and painful.
Bursitis is usually local, position-dependent, and aggravated by pressure. It often sits alongside tendon overload or movement inefficiency rather than occurring in isolation.
In many cases, the bursa is reacting to something else.
Effective management is not about prolonged rest. It is about:
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Identifying and reducing the specific irritant
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Addressing mechanical drivers such as strength deficits or poor load progression
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Restoring movement control
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Gradually rebuilding tolerance
Medication or injection may reduce symptoms in selected cases, but without correcting the underlying cause, recurrence is common.
Most bursitis behaves mechanically and improves with appropriate modification and rehabilitation. If symptoms are rapidly worsening, associated with redness, heat, fever, or systemic illness, urgent medical assessment is required.
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Calm the irritation.
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Correct the driver.
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Restore tolerance.
That is how bursitis resolves — and stays resolved.
Educational Notice
This content is intended for educational guidance only and reflects current evidence and clinical reasoning at the time of publication. It does not replace individual assessment, diagnosis, or treatment provided by your healthcare practitioner. Management decisions should always be based on personalised clinical evaluation.
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There is a great deal of misinformation and oversimplified advice online regarding musculoskeletal and spinal conditions. If you have found this page helpful, you are very welcome to share it with anyone who may benefit from clear, evidence-informed information.
Please share the page in full via direct link. Reproduction, copying, or republishing of the written content or images without permission is not permitted. Producing accurate educational material of this depth takes significant time, clinical experience, and ongoing review — and I choose to keep it freely accessible for the benefit of patients and healthcare professionals.
Responsible sharing is genuinely appreciated.
Bursitis FAQs
1) Is bursitis just inflammation?
Not always.
While “-itis” suggests inflammation, many cases of mechanical bursitis involve irritation and sensitivity due to repeated compression or overload rather than a purely inflammatory disease process.
There may be fluid and local inflammatory activity, but the driver is often mechanical.
2) How long does bursitis take to settle?
This depends on the cause.
If it is primarily due to pressure (for example, kneeling), symptoms may improve within a few weeks once the irritant is removed.
If it sits alongside tendon overload or movement dysfunction, recovery may take longer because the underlying driver must be addressed.
Persistent cases often reflect incomplete correction of the mechanical cause rather than failure of the bursa to heal.
3) Should I completely rest bursitis?
Complete rest is rarely necessary and often unhelpful long-term.
Targeted reduction of aggravating activities is important, particularly compression. However, maintaining comfortable movement and gradually restoring load tolerance prevents deconditioning and prolonged sensitivity.
The aim is modification, not avoidance.
4) Can exercise make bursitis worse?
Poorly chosen exercise can increase compression and aggravate symptoms.
Appropriately selected exercise, however, often improves outcomes by restoring strength, movement efficiency and load distribution.
The key is choosing exercises that do not repeatedly compress the irritated bursa while still rebuilding capacity.
5) Does bursitis always show on a scan?
Not necessarily.
Ultrasound may show fluid or thickening in a bursa, but imaging findings do not always correlate with pain. Some people have visible bursal fluid and no symptoms, while others have significant pain with minimal imaging changes.
Imaging supports diagnosis. It does not replace clinical assessment.
6) Is bursitis the same as tendonitis?
No.
A bursa is a fluid-filled sac that reduces friction. A tendon connects muscle to bone and transmits force.
They often sit close together and can be irritated simultaneously, which is why the diagnoses are sometimes confused.
7) Is bursitis the same as tendonitis?
Yes — if the underlying irritant is not addressed.
Recurrence is common when compression habits, poor load progression, strength deficits or movement inefficiencies remain unchanged.
Addressing the driver reduces recurrence risk significantly.
8) When should I worry about bursitis?
Seek medical assessment urgently if you develop:
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Rapidly increasing redness
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Significant warmth
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Progressive swelling
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Fever or feeling unwell
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Severe pain that is worsening
These may suggest infection and require prompt medical evaluation.
9) Is bursitis more common in certain people?
It can be more common in individuals who:
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Perform repetitive tasks
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Kneel or lean on joints frequently
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Increase training load rapidly
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Have diabetes
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Have inflammatory joint conditions
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Have hormonal changes such as menopause
In these cases, both mechanical and systemic factors may contribute.
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