Shoulder pain when lifting your arm is one of the most common shoulder complaints.

You may notice pain when:

• Reaching overhead
• Putting on a shirt
• Combing your hair
• Reaching into a cupboard
• Lifting weights
• Reaching behind your back
• Sleeping on the affected side

Common possibilities include:

• Rotator cuff irritation or tear
• Tendon-related pain
• Bursitis
• Impingement-type shoulder pain
• Frozen shoulder
• Arthritis
• Injury after a fall or sudden pull

Mayo Clinic notes that rotator cuff problems can cause pain, weakness and reduced movement, with symptoms often becoming noticeable when lifting the arm or reaching overhead.

What Is the Rotator Cuff?

The rotator cuff is a group of muscles and tendons surrounding the shoulder joint.

Its job is to help:

• Stabilise the shoulder
• Raise the arm
• Rotate the arm
• Control shoulder movement

Because these tendons are used repeatedly throughout daily life, they can become irritated or damaged over time.

Mayo Clinic describes rotator cuff injury as irritation or damage to these tendons that may cause pain, weakness and reduced range of motion.

Why Does My Shoulder Hurt When I Lift My Arm?

Lifting the arm places demand on several shoulder structures.

Pain may occur when:

• A tendon is irritated
• A bursa is inflamed
• A tendon is partially or fully torn
• The shoulder has become stiff
• The joint itself is irritated

The exact location and movement pattern can provide useful clues.

What Is Rotator Cuff Tendinopathy?

Rotator cuff tendinopathy refers to irritation and degeneration affecting one or more rotator cuff tendons.

Symptoms may include:

• Pain with overhead movement
• Pain reaching behind the back
• Night pain
• Pain when lying on the shoulder
• Weakness

Mayo Clinic notes that repetitive overhead activity, heavy lifting and age-related tendon wear can contribute to rotator cuff problems.

What Is Shoulder Impingement?

The term “impingement” is often used for shoulder pain that occurs when structures around the rotator cuff become irritated during certain movements.

Patients often describe:

• Pain lifting the arm
• Pain at shoulder height
• Pain reaching overhead
• Pain lowering the arm

The term does not identify one exact cause in every patient, so proper assessment is useful when symptoms persist.

Why Does My Shoulder Hurt Between About 60 and 120 Degrees?

Some patients experience a painful part of the movement while raising the arm, but less pain before or after that range.

This is sometimes called a painful arc.

It can occur with rotator cuff or subacromial shoulder problems.

However, a painful arc is only one clinical clue and should not be used alone to diagnose the problem.

Could I Have a Rotator Cuff Tear?

Possibly.

A rotator cuff tear may occur gradually through wear or suddenly after an injury.

Possible symptoms include:

• Pain lifting the arm
• Weakness
• Night pain
• Difficulty reaching overhead
• Difficulty reaching behind the back

Mayo Clinic notes that a sudden rotator cuff tear can occur after trauma and may cause an immediate inability to raise or rotate the arm.

What if I Suddenly Cannot Lift My Arm After an Injury?

That deserves prompt assessment.

Mayo Clinic advises immediate medical evaluation when shoulder injury is associated with sudden weakness or inability to raise the arm.

Possible causes can include:

• Rotator cuff tear
• Dislocation
• Fracture
• Other tendon injury

This is different from gradual shoulder pain that has developed over weeks or months.

What Is Frozen Shoulder?

Frozen shoulder causes:

• Pain
• Significant stiffness
• Progressive loss of movement

A key feature is that the shoulder becomes difficult to move in multiple directions.

The NHS notes that frozen shoulder can cause pain severe enough to disturb sleep together with stiffness that makes shoulder movement difficult.

How Can I Tell Frozen Shoulder From a Rotator Cuff Problem?

One useful difference is stiffness.

With many rotator cuff problems:

• Lifting may hurt
• Strength may be reduced
• But someone else may still be able to move the shoulder through much of its range

With frozen shoulder:

• Your own movement is restricted
• Passive movement is also usually restricted
• Reaching behind your back may become especially difficult

A clinical examination is more reliable than trying to self-diagnose based on one symptom.

Why Is My Shoulder Pain Worse at Night?

Night pain is common with several shoulder conditions.

Rotator cuff problems can disturb sleep, particularly when lying on the affected side.

Frozen shoulder can also cause significant night pain.

Night pain alone does not tell you which condition is present.

Why Does My Shoulder Hurt When Reaching Behind My Back?

Reaching behind your back requires substantial shoulder movement.

Pain or restriction may occur with:

• Rotator cuff problems
• Frozen shoulder
• Joint stiffness
• Other shoulder conditions

Mayo Clinic specifically notes difficulty reaching behind the back as a common rotator cuff symptom.

What if My Shoulder Feels Weak?

Weakness can be important.

You may notice:

• Difficulty lifting a bag
• Reduced overhead strength
• Difficulty holding the arm up
• Difficulty lifting weights you previously managed

Weakness can occur with pain alone, but a significant tendon tear is another possibility.

Persistent or sudden weakness should be assessed.

Can Neck Problems Cause Shoulder Pain?

Yes.

Not all pain felt around the shoulder actually comes from the shoulder joint.

A cervical nerve problem can sometimes cause:

• Shoulder pain
• Arm pain
• Tingling
• Numbness
• Weakness

If symptoms extend below the shoulder into the arm or hand, the neck may also need to be examined.

Should I Rest My Shoulder Completely?

Usually not for prolonged periods unless you have been specifically instructed to immobilise it.

The NHS advises remaining active and gently moving the shoulder rather than completely stopping use, while avoiding activities that clearly make the pain worse.

Prolonged avoidance can contribute to stiffness.

Should I Keep Exercising Through Shoulder Pain?

Exercise is often useful, but it should be appropriate for the condition.

A good programme may progress:

• Mobility
• Rotator cuff strength
• Shoulder-blade control
• Functional lifting

However, exercises that repeatedly cause major worsening may need modification.

The goal is gradual improvement, not simply forcing through severe pain.

Can Physiotherapy Help?

Yes.

Physiotherapy is commonly used for many shoulder problems.

It may include:

• Movement exercises
• Rotator cuff strengthening
• Shoulder-blade strengthening
• Gradual return to overhead activity
• Functional rehabilitation

The NHS notes that physiotherapy and home exercises are commonly used for shoulder pain.

What if Physiotherapy Is Not Working?

If shoulder pain remains significant after an appropriate period of physiotherapy, it may be reasonable to reassess the diagnosis.

The NHS advises going back for reassessment if pain continues after physiotherapy.

Questions may include:

• Is this actually a rotator cuff problem?
• Is there a tear?
• Is the shoulder becoming frozen?
• Is the pain coming from the neck?
• Would imaging change treatment?

Repeating the same treatment indefinitely is not always the best next step.

Should I Get an X-Ray?

An X-ray may be useful if the doctor is assessing:

• Arthritis
• Fracture
• Bone abnormalities
• Certain changes around the shoulder joint

However, an X-ray does not directly show the rotator cuff tendons in detail.

Is Ultrasound Useful for Shoulder Pain?

Yes, in selected situations.

Musculoskeletal ultrasound can assess structures such as:

• Rotator cuff tendons
• Biceps tendon
• Bursa

It can be particularly useful when the main question involves tendon injury.

The choice between ultrasound and MRI depends on the suspected problem.

When Is MRI Useful?

MRI provides more comprehensive detail of the shoulder.

It can evaluate:

• Rotator cuff tendons
• Muscles
• Labrum
• Biceps tendon
• Bone
• Joint structures
• Soft tissues

RadiologyInfo states that shoulder MRI is particularly useful for evaluating rotator cuff tears, biceps tendon injury, labral damage, arthritis and unexplained shoulder pain that does not improve with treatment.

MRI vs Ultrasound: Which Is Better for Shoulder Pain?

Neither test is universally better.

Ultrasound May Be Useful For:

• Rotator cuff tendon assessment
• Biceps tendon problems
• Bursitis
• Dynamic tendon evaluation

MRI May Be Useful For:

• Rotator cuff tears
• Deeper structural assessment
• Labral problems
• Multiple possible causes
• Persistent unexplained pain
• Pre-procedure or surgical planning

The clinical question should determine the scan.

Does Shoulder MRI Use Radiation?

No.

MRI does not use ionising radiation.

RadiologyInfo confirms that shoulder MRI uses a magnetic field and radiofrequency energy rather than X-rays.

Does Everyone With Shoulder Pain Need MRI?

No.

A scan may not be necessary when:

• Symptoms started recently
• There was no significant injury
• Movement and strength are gradually improving
• The diagnosis is reasonably clear
• Imaging would not change treatment

MRI becomes more useful when:

• Pain persists despite treatment
• Significant weakness is present
• A tendon tear is suspected
• The diagnosis is unclear
• Surgery or another procedure is being considered

What if My MRI Shows a Rotator Cuff Tear?

A tear does not automatically mean surgery.

The treatment decision depends on factors such as:

• Whether the tear was traumatic
• Tear size
• Age
• Strength
• Functional demands
• Duration of symptoms
• Response to rehabilitation

Some tears can be managed non-surgically.

A sudden traumatic tear with major weakness is a different situation and may require earlier orthopaedic assessment.

When Should I See a Doctor?

Arrange an assessment if:

• Pain has continued for more than a few weeks
• You cannot comfortably raise the arm
• Night pain is persistent
• The shoulder is becoming increasingly stiff
• Strength is decreasing
• Physiotherapy is not helping
• You had a significant injury

The NHS advises medical assessment when shoulder pain does not improve after about two weeks or makes arm movement very difficult.

When Is Shoulder Pain Urgent?

Seek prompt medical attention if shoulder pain follows an injury and you have:

• Severe pain
• Sudden swelling
• Visible deformity
• Inability to raise the arm
• Immediate significant weakness

Mayo Clinic lists these as reasons for immediate medical evaluation.

How Much Does a Shoulder MRI Cost in Singapore?

For many patients arranging a shoulder MRI through The Pain Relief Clinic, the current price is approximately:

S$1,000

This generally includes:

• MRI examination
• MRI images
• Formal radiologist’s report

Eligible outpatient diagnostic scans may qualify for up to:

S$600 per patient per year from MediSave

subject to prevailing requirements and the patient’s remaining annual limit.

Singapore’s Ministry of Health confirms that the annual MediSave withdrawal limit for eligible outpatient scans increased to S$600 from 1 January 2026.

How Quickly Can I Get a Shoulder MRI?

When MRI is medically appropriate, The Pain Relief Clinic can often arrange shoulder imaging:

Within one working day

subject to:

• MRI safety screening
• Correct imaging protocol
• Appointment availability

Frequently Asked Questions About Shoulder Pain When Lifting the Arm

Why does my shoulder hurt when I lift my arm?

Common possibilities include rotator cuff problems, tendon irritation, bursitis, frozen shoulder or arthritis.

Does pain lifting my arm mean I tore my rotator cuff?

Not necessarily. Tendon irritation can cause similar pain. Significant weakness, especially after an injury, makes a tear more important to consider.

Why does my shoulder hurt at night?

Rotator cuff problems and frozen shoulder can both cause night pain.

Should I get an ultrasound or MRI?

It depends on the suspected problem. Ultrasound is useful for many tendon problems, while MRI provides broader assessment of the rotator cuff, labrum and other shoulder structures.

Does MRI show a rotator cuff tear?

Yes. Shoulder MRI can provide detailed assessment of rotator cuff tears.

Does MRI use radiation?

No. MRI does not use ionising radiation.

Does a rotator cuff tear always need surgery?

No. Treatment depends on the type of tear, severity, weakness, injury mechanism and response to non-surgical care.

How much does a shoulder MRI cost?

A shoulder MRI arranged through The Pain Relief Clinic is currently approximately S$1,000, including scan images and a formal radiologist’s report.

Shoulder Pain Every Time You Lift Your Arm?

If shoulder pain keeps interfering with dressing, reaching overhead, work, exercise or sleep, it may be useful to determine which structure is actually responsible.

At The Pain Relief Clinic, we can assess:

• Shoulder movement
• Strength
• Whether symptoms suggest a rotator cuff problem
• Whether frozen shoulder may be developing
• Whether symptoms may be coming from the neck
• Whether X-ray, ultrasound, MRI or no imaging is most appropriate
• Which non-surgical treatment options may be appropriate

When MRI is medically indicated, shoulder imaging can often be arranged within one working day.

Shoulder pain assessment through The Pain Relief Clinic

• Medical assessment by a licensed medical doctor
• In-house physiotherapy
• Non-surgical treatment where appropriate
• Fast access to imaging when indicated
• Shoulder MRI often available within one working day
• Approximately S$1,000 for many shoulder MRI examinations
• Up to S$600 MediSave for eligible outpatient diagnostic scans
• Formal radiologist’s report
• Rehabilitation and strengthening where appropriate
• Referral for orthopaedic review when appropriate

Arrange a Shoulder Pain Assessment

The Pain Relief Clinic

Call / WhatsApp: +65 9068 9605

If shoulder pain is preventing you from comfortably lifting your arm — particularly if it has persisted despite rest or physiotherapy, or is associated with significant weakness — contact us for an assessment.

---

References

1. Mayo Clinic — Rotator Cuff Injury: Symptoms and Causes.
2. Mayo Clinic Orthopedics & Sports Medicine — Rotator Cuff Tendonitis and Tears.
3. Mayo Clinic Healthcare — Rotator Cuff Injury.
4. NHS — Shoulder Pain.
5. NHS — Frozen Shoulder.
6. RadiologyInfo.org, American College of Radiology and Radiological Society of North America — Shoulder MRI, reviewed 15 June 2026.
7. Singapore Ministry of Health — Outpatient Care, updated 1 June 2026.
8. Singapore Ministry of Health — Adequacy of S$600 Annual MediSave Withdrawal Limit for Outpatient CT and MRI Scans, 6 August 2026.

---

Important Medical Information

This article provides general educational information and does not replace an individual medical consultation.

Shoulder pain when lifting the arm can result from rotator cuff problems, tendon irritation, frozen shoulder, arthritis, injury, referred pain from the neck or other conditions. The movement pattern alone cannot establish the diagnosis.

Imaging is not required for every case of shoulder pain. The appropriate investigation depends on symptoms, strength, range of movement, trauma history, duration, examination findings and whether the result would change treatment.

Seek prompt medical attention for severe shoulder pain after an injury, visible deformity, sudden swelling, immediate significant weakness or inability to raise the arm.

Reviewed by Dr Terence Tan, Founder of The Pain Relief Clinic — 18 September 2026