Shoulder Tendonitis

Is shoulder pain making everyday activities increasingly difficult?

Perhaps you're finding it uncomfortable to lift your arm, reach into an overhead cupboard or even get a good night's sleep. Activities you once did without a second thought can suddenly become painful and frustrating.

If you've been diagnosed with shoulder tendonitis, you'll know just how much it can interfere with your normal routine.

Shoulder tendonitis commonly affects the rotator cuff or biceps tendons and can develop through repetitive strain, injury or age-related changes.

The good news is that many cases improve without surgery. Understanding what's causing the problem, what may be aggravating it and how to approach recovery can make a meaningful difference.

What Is Shoulder Tendonitis?

Your shoulder is one of the most mobile joints in your body. It allows you to lift, reach, rotate and move your arm in almost every direction.

To achieve this remarkable range of movement, it relies on a complex network of muscles and tendons working together.

Tendons are strong bands of connective tissue that attach muscles to bones. Among the most important are the rotator cuff tendons, which help stabilise your shoulder while allowing you to raise and rotate your arm.

Shoulder tendonitis occurs when one or more of these tendons become irritated or inflamed, often following excessive or repetitive physical stress.

However, there's an important distinction worth understanding.

Although the term tendonitis suggests inflammation, ongoing tendon pain isn't always caused by inflammation alone.

Healthcare professionals increasingly use the term shoulder tendinopathy to describe a broader range of tendon problems, including structural changes and a reduced ability to tolerate physical loading.

This distinction matters because treating a persistently painful tendon may involve more than simply reducing inflammation. Restoring strength and improving how the tendon handles everyday activities can be equally important. ^[1]

What Are the Different Types of Shoulder Tendonitis?

Not all shoulder tendonitis affects the same area. Understanding which tendon is involved can help explain why certain movements are more painful than others.

Rotator Cuff Tendonitis

Rotator cuff tendonitis is one of the most common causes of tendon-related shoulder pain.

The rotator cuff comprises four muscles and their associated tendons, which help keep the upper arm bone stable within the shoulder joint.

The supraspinatus tendon is particularly susceptible to irritation due to its location beneath the acromion, the bony projection at the top of the shoulder.

Pain is often felt along the outer shoulder and may become more noticeable when lifting your arm, reaching overhead or lying on the affected side.

Biceps Tendonitis

If your pain is concentrated towards the front of your shoulder, the biceps tendon may be involved.

Biceps tendonitis commonly affects the long head of the biceps tendon, which connects near the top of the shoulder socket.

Activities such as lifting shopping bags, reaching backwards to put on a jacket or fastening a seatbelt may become uncomfortable.

Biceps tendonitis can also occur alongside rotator cuff problems, so the location of pain alone isn't enough to confirm a diagnosis. ^[2]

Calcific Shoulder Tendonitis

Calcific tendonitis is a condition in which calcium deposits develop within a shoulder tendon, most commonly one of the rotator cuff tendons.

While some people experience little discomfort, others may develop episodes of intense shoulder pain, sometimes without an obvious injury.

Because calcific tendonitis can behave differently from other forms of tendinopathy, treatment may need to be tailored to the particular stage and severity of the condition. ^[3]

What Are the Common Symptoms of Shoulder Tendonitis?

One of the frustrating things about shoulder tendonitis is how much it can interfere with seemingly simple movements.

You might manage reasonably well with your arm by your side, only to experience a sharp pain when reaching overhead or trying to lift something.

Common symptoms include:

• Pain when lifting your arm: Particularly when reaching overhead, extending your arm away from your body or lifting objects.
• Pain around the shoulder: Usually felt along the front, top or outer shoulder, sometimes extending into the upper arm.
• Night-time shoulder pain: Discomfort when lying on the affected shoulder, making it difficult to find a comfortable sleeping position.
• Restricted movement: Difficulty getting dressed, washing your hair or reaching behind your back.
• Shoulder weakness: Reduced strength or difficulty carrying objects, sometimes because pain prevents the muscles from working normally.
• Pain following activity: Discomfort that develops or becomes more noticeable after gardening, exercise or repetitive physical work.

Symptoms can develop gradually over several weeks or become noticeable following a particular activity or injury.

Something worth remembering: Shoulder pain doesn't always indicate how badly a tendon is damaged. Significant discomfort can occur without a tendon tear, while some structural tendon changes produce surprisingly few symptoms.

This is one reason an accurate diagnosis is so important.

What Causes Shoulder Tendonitis?

Shoulder tendonitis isn't limited to athletes or people performing heavy physical work.

In fact, ordinary activities can contribute to tendon irritation, particularly when they involve repetitive movements or place demands on the shoulder that it's no longer accustomed to handling.

Some common contributing factors include:

Repetitive Shoulder Movements

Painting, gardening, washing windows, household repairs and repeatedly reaching overhead can place additional strain on the shoulder tendons.

Sports and Exercise

Swimming, tennis, golf and weightlifting all involve repeated shoulder movements. A sudden increase in training intensity can sometimes overload a tendon before it has had time to adapt.

Age-Related Tendon Changes

As we get older, tendons can undergo structural changes that affect their strength and ability to tolerate physical stress.

This helps explain why shoulder tendon problems become increasingly common during middle age and beyond, even without an obvious injury.

Sudden Injury or Overexertion

Lifting an unexpectedly heavy object, falling onto your shoulder or performing an unfamiliar strenuous activity may trigger tendon pain.

Reduced Shoulder Strength

Weakness in the rotator cuff or surrounding muscles may make everyday activities more demanding for the affected tendons.

Often, several contributing factors are involved rather than one identifiable cause. ^[1]

Why Can Shoulder Tendonitis Be So Difficult to Manage?

One of the challenges with shoulder tendonitis is that you can't simply stop using your shoulder.

Think about how frequently you move your arm throughout the day.

Getting dressed, cooking, driving, cleaning, reaching for something on a shelf and even adjusting your sleeping position all require shoulder movement.

And because these movements are so routine, it's easy to keep aggravating an already painful tendon without realising it.

Another difficulty is that symptoms don't always follow a predictable pattern.

You may have a relatively comfortable day, become more active and then notice increased soreness later that evening or the following morning.

This doesn't necessarily mean you've caused further damage, but it may indicate that the activity exceeded what your shoulder could comfortably tolerate at that stage.

The challenge is finding the right balance: reducing activities that aggravate your symptoms while maintaining enough movement and gradual strengthening to support recovery.

Shoulder Tendonitis vs Shoulder Bursitis – What's the Difference?

Shoulder tendonitis and shoulder bursitis are often confused because they can cause very similar symptoms.

The main difference is which structure is affected.

Shoulder tendonitis involves irritation or changes affecting the tendons that connect muscles to bones.

Shoulder bursitis involves inflammation of a small fluid-filled sac called a bursa, which cushions the surrounding tissues and helps reduce friction during movement.

In the shoulder, the subacromial bursa sits directly above the rotator cuff tendons.

Because these structures are so close together, it's possible to experience both tendon irritation and bursitis at the same time.

Both conditions may cause pain when lifting the arm, difficulty sleeping and reduced shoulder mobility.

However, their underlying causes and treatment requirements aren't necessarily identical.

For example, a shoulder with an inflamed bursa may need aggravating activities reduced while the irritation settles, whereas persistent tendon problems often benefit from carefully managed, progressive strengthening.

>> Learn More About Shoulder Bursitis and Its Treatment Options

How Is Shoulder Tendonitis Diagnosed?

If your shoulder pain is persistent or affecting your normal activities, it's worth having the condition properly assessed.

A healthcare professional will usually begin by discussing your symptoms and examining how your shoulder moves.

They may assess your range of motion, muscle strength, tenderness and the particular movements that reproduce your pain.

An examination can often provide useful information without immediately requiring an MRI or ultrasound.

However, imaging may be recommended if symptoms don't improve, the diagnosis remains uncertain or a significant tendon injury is suspected.

• Ultrasound: Can help identify tendon thickening, calcium deposits, inflammation or tears.
• MRI: Provides more detailed information about the shoulder's soft tissues, particularly when a more significant injury is suspected.
• X-rays: May help identify calcium deposits, arthritis or other bone-related changes.

Not everyone with suspected shoulder tendonitis needs imaging at the outset. Current clinical guidance generally supports an initial clinical assessment, with imaging considered when appropriate. ^[4]

What Are the Treatment Options for Shoulder Tendonitis?

If you're dealing with persistent shoulder pain, it's understandable that your first priority is to get some relief.

However, an effective treatment approach should also consider why the tendon became irritated and what can be done to reduce the likelihood of the problem returning.

Depending on the severity and underlying cause, treatment may involve a combination of the following approaches.

1. Activity Modification and Relative Rest

When your shoulder is painful, your first instinct may be to stop using it altogether.

And while avoiding activities that aggravate an irritated tendon is often sensible, prolonged complete rest isn't necessarily the answer.

Your shoulder still needs appropriate movement to maintain flexibility, muscle strength and normal function.

Instead, try temporarily modifying activities that place excessive stress on the affected tendon.

For example, you might need to avoid heavy overhead lifting, break household tasks into shorter sessions or reduce the intensity of activities that consistently trigger pain.

The aim is to give the tendon an opportunity to settle without allowing unnecessary stiffness and weakness to develop.

2. Heat Therapy

For those experiencing ongoing shoulder stiffness or muscle tension, gentle heat may provide some welcome comfort.

Applying a warm compress or heat pack to the shoulder for 15–20 minutes at a time may help relax surrounding muscles and make movement more comfortable.

Heat can be particularly helpful when the shoulder feels tight or stiff after periods of inactivity.

However, it may not be suitable immediately following an acute injury or when significant swelling is present.

Always wrap heat packs in a towel and avoid temperatures that could irritate or burn the skin.

3. Physiotherapy and Rehabilitation

Physiotherapy can play an important role in recovering from shoulder tendonitis, but the timing and intensity of the exercises matter.

If your shoulder is particularly painful, forcing it through strenuous strengthening exercises may aggravate your symptoms.

That doesn't necessarily mean all exercise should be avoided.

During the early stages, a physiotherapist may recommend gentle movements and carefully selected exercises that place manageable demands on the tendon.

As your symptoms improve, a progressive rehabilitation program can help:

• Restore comfortable shoulder movement.
• Strengthen the rotator cuff and surrounding muscles.
• Rebuild muscle strength lost through reduced activity.
• Improve shoulder stability and control.
• Gradually increase the tendon's ability to tolerate everyday physical demands.

One important point is that rehabilitation shouldn't always be delayed until every trace of discomfort has disappeared.

Appropriately graded strengthening is an established first-line treatment for rotator cuff tendinopathy, provided the exercise program is suited to the individual's condition and tolerance. ^[4]

4. Pain Relief and Anti-Inflammatory Medication

Depending on your symptoms, a healthcare professional may recommend pain-relieving medication or a short course of non-steroidal anti-inflammatory drugs (NSAIDs).

These medicines may help relieve discomfort, particularly when inflammation contributes to your symptoms.

However, they aren't suitable for everyone, especially people with certain medical conditions or those taking medications that may interact with them.

It's also worth remembering that temporarily reducing pain doesn't necessarily mean the tendon has recovered its normal strength or tolerance for activity.

5. Corticosteroid Injections

For particularly troublesome or persistent symptoms, a healthcare professional may consider a corticosteroid injection.

These injections can sometimes provide short-term relief, helping make everyday movement more comfortable.

However, they're not generally recommended as the first treatment for rotator cuff tendinopathy, and repeated injections may carry risks.

The potential benefits and limitations should be discussed with a qualified healthcare professional. ^[4]

6. Drug-Free Home Treatment Options

Not everyone wants to rely solely on medication to manage shoulder discomfort.

Some people may be unable to take certain medications because of existing health conditions, while others simply prefer to explore drug-free alternatives.

Depending on the cause of the symptoms, non-invasive home treatment options may be considered alongside appropriate rest, activity modification and rehabilitation.

The important thing is to understand what each treatment is designed to address, rather than expecting one approach to resolve every possible cause of shoulder pain.

Managing Shoulder Tendonitis Symptoms with OSMO Patch

When shoulder pain interferes with your sleep, work or everyday activities, finding a practical way to manage the discomfort becomes an understandable priority.

For people experiencing swelling and associated pain around the shoulder, the OSMO Patch offers a drug-free, non-invasive home treatment option designed to help reduce swelling and associated discomfort.

It's a simple approach that fits around your normal routine. The patch is applied to the affected area before going to bed and works while you sleep.

OSMO Patch may be considered alongside appropriate rest, activity modification and rehabilitation. However, tendon pain isn't always caused by swelling, and the patch isn't intended to repair damaged tendons or replace necessary rehabilitation.

(ALWAYS FOLLOW THE DIRECTIONS FOR USE. Not suitable for individuals with seafood or shellfish allergies)

Discover How OSMO Patch Works

Watch the Video to learn exactly how the OSMO Patch works and discover how it may be used together with proper rest to support the relief of inflammation and the associated pain in conditions such as shoulder tendonitis.

How Long Does Shoulder Tendonitis Take to Heal?

If you've been struggling with shoulder pain for some time, one of the first questions you're likely to ask is, "How long before I can get back to normal?"

Unfortunately, there's no single answer.

Recovery depends on several factors, including which tendon is affected, how long you've had symptoms, the severity of the problem and whether other shoulder structures are involved.

Milder cases may begin improving within a few weeks, while more persistent tendon problems can take several months to settle.

It's also important to distinguish between feeling better and being fully recovered.

Your pain may improve before the tendon and surrounding muscles have regained the strength needed for heavier or more demanding activities.

Returning too quickly to strenuous exercise, repetitive overhead work or heavy lifting may aggravate symptoms and delay progress.

A gradual return to normal activity, guided by your symptoms and an appropriate rehabilitation program, is generally a more sustainable approach. ^[4]

Practical Tips for Managing Shoulder Tendonitis Day to Day

While your shoulder is recovering, a few simple adjustments may help make everyday activities more manageable.

Make Sleeping More Comfortable

Try avoiding direct pressure on the painful shoulder. Sleeping on your opposite side or supporting your affected arm with a pillow may help you find a more comfortable position.

Think About How You Lift

Where possible, keep objects closer to your body rather than lifting them with your arm fully extended.

You may also need to reduce the weight of items you're lifting until your shoulder becomes more comfortable.

Break Up Repetitive Activities

Rather than spending an extended period gardening, painting or performing household tasks, consider shorter sessions with regular breaks.

Don't Push Through Significant Pain

Some mild discomfort during rehabilitation may be acceptable, but repeatedly forcing the shoulder through movements that cause significant or lasting pain can aggravate symptoms.

Be Patient with Your Recovery

Progress isn't always perfectly consistent. An occasional uncomfortable day doesn't necessarily mean your recovery has failed.

The aim is gradual improvement in what your shoulder can comfortably manage over time.

Frequently Asked Questions About Shoulder Tendonitis

Can Shoulder Tendonitis Cause Pain at Night?

Yes. Night-time shoulder pain is a common complaint, particularly when lying on the affected side.

Supporting your arm with a pillow or changing your sleeping position may help reduce pressure and improve comfort.

Can Shoulder Tendonitis Cause Pain Down the Arm?

Yes. Pain from irritated shoulder tendons may extend from the shoulder into the upper arm, sometimes towards the elbow.

However, pain accompanied by numbness, tingling or symptoms extending into the hand may indicate another problem requiring assessment.

Is Shoulder Tendonitis the Same as a Rotator Cuff Tear?

No. Tendonitis or tendinopathy involves irritation or changes within the tendon, while a rotator cuff tear involves a partial or complete disruption of tendon fibres.

The conditions can share symptoms, so an examination may be needed to distinguish between them.

Should I Exercise with Shoulder Tendonitis?

Appropriately selected exercises can help maintain movement and rebuild shoulder strength.

However, strenuous exercises that significantly aggravate symptoms should be modified or avoided until they can be tolerated.

A physiotherapist can help determine which exercises are appropriate for your stage of recovery.

Can Shoulder Tendonitis Heal Without Surgery?

Yes. Many cases improve through conservative management, including activity modification, rehabilitation and appropriate pain relief.

Surgery is generally reserved for selected cases involving persistent symptoms or associated structural problems.

Can Shoulder Tendonitis Come Back?

Yes. Symptoms can recur if the underlying factors contributing to tendon overload aren't addressed.

Maintaining shoulder strength, gradually increasing physical activity and modifying repetitive movements when necessary may help reduce the likelihood of recurring problems.

When Should You Seek Medical Attention?

If your shoulder pain isn't improving, continues to worsen or is interfering significantly with your daily activities, arrange an assessment with a qualified healthcare professional.

Seek urgent medical attention if you experience sudden severe pain after an injury, an inability to lift your arm, marked swelling or deformity, fever, or new numbness or loss of sensation.

Shoulder or arm discomfort accompanied by chest pain, breathlessness or sweating requires emergency medical assessment. ^[5]

Medical References

The following medical resources provide further information about shoulder tendonitis, related conditions and established treatment approaches.

1. American Academy of Orthopaedic Surgeons (AAOS). Shoulder Pain and Common Shoulder Problems. Read the AAOS medical resource.
2. American Academy of Orthopaedic Surgeons (AAOS). Biceps Tendinitis. Read the AAOS medical resource.
3. American Academy of Orthopaedic Surgeons (AAOS). Calcific Tendinitis of the Shoulder. Read the AAOS medical resource.
4. Desmeules F, et al. (2025). Rotator Cuff Tendinopathy Diagnosis, Nonsurgical Medical Care, and Rehabilitation: A Clinical Practice Guideline. Journal of Orthopaedic & Sports Physical Therapy. 2025;55(4):235–274. DOI: 10.2519/jospt.2025.13182. Read the clinical practice guideline.
5. National Health Service (NHS). Shoulder Pain – Symptoms, Self-Care and Treatment. Read the NHS guidance.