Catching feeling in shoulder when lifting arm?
Impingement Syndrome. Tendon pinches between bones causing pain.
Lifting arm at certain angles produces a ‘catching’ sensation with pain. Sometimes feels better when lifted higher. If this symptom repeats, it can lead to tendon damage.
Quick Answer: Impingement syndrome occurs when shoulder tendons repeatedly pinch or rub in the subacromial space causing pain. The order matters. We calm the pain first, restore scapular and rotator cuff function, and then change patterns to prevent re-impingement in daily movements.
Seek medical attention quickly if:
- Sudden inability to lift arm or sharp strength drop after trauma
- Night pain so severe sleep is impossible
- Swelling, warmth, fever with rapidly worsening pain
- Numbness or decreased sensation progressing
3 Key Points on This Page
- Structural reason why impingement syndrome occurs
- Why pain occurs only at certain angles
- How posture correction prevents and treats
These symptoms suggest impingement syndrome
- Pain when lifting the arm 60-120 degrees. It hurts at a certain angle and feels better when lifted higher, the painful arc.
- A catching feeling in the shoulder. Something catches or clicks when you lift the arm.
- Front shoulder pain when reaching. It stands out when reaching forward or grabbing something overhead.
- Uncomfortable lying on the painful side at night. The pressure worsens the pain.
- Worse after repetitive shoulder use. More pain follows cleaning, exercising, or painting-type movements.
Why does tendon get pinched?
The shoulder has a narrow tunnel called the subacromial space. Rotator cuff tendons pass through this space, and when it narrows, tendons repeatedly pinch against bone (acromion) causing friction.
Repeated friction creates inflammation, inflammation causes tendon swelling, and swelling further narrows the space. A vicious cycle begins.
Why Space Narrows
- Rounded shoulders. Shoulders rolling forward tilt the acromion forward and narrow the space.
- Shoulder muscle imbalance. Excessive upper trapezius tension pulls the scapula upward.
- Acromion shape. A congenitally downward-curved acromion.
- Bursa inflammation. The shock-absorbing bursa swells.
Why pain only at certain angles? (Painful Arc)
When lifting the arm sideways:
- 0-60 degrees. The tendon sits under the acromion and isn’t pinching yet.
- 60-120 degrees. The tendon passes under the acromion and impinges. This is the most painful range.
- 120+ degrees. The scapula rotates and secures the space again, so pain decreases.
This ‘Painful Arc’ pattern is characteristic of impingement syndrome. However, rotator cuff tear can show similar pattern, requiring precise evaluation.
Why can the pain return after it settles?
Raising the arm is not a shoulder-joint movement alone. The upper arm and shoulder blade need to move together in a coordinated sequence to maintain space beneath the acromion. If pain settles before this coordination is sufficiently restored, repeated arm use may place stress on the area again.
This educational model illustrates the principles of normal movement. An examination and movement assessment are needed to determine the cause of an individual’s pain.
Is it shoulder impingement or another shoulder problem?
Pain when raising the arm through a specific angle is not always impingement syndrome. Rotator cuff tears and early frozen shoulder need to be distinguished.
Shoulder Impingement Syndrome
- Pain in the 60-120° arc when raising the arm (painful arc)
- Pain actually decreases above 120°
- Weakness is not a prominent feature. Pain dominates
- Night pain possible but usually less severe than with a tear
Rotator Cuff Tear
- Marked weakness when raising or rotating the arm
- In severe cases, the arm cannot be actively raised at all
- Pain spans a wider arc than typical impingement
- Tendon tear confirmed on ultrasound or MRI
Early frozen shoulder can masquerade as impingement. The key difference is that frozen shoulder progressively restricts all shoulder movements, including reaching behind the back, lifting overhead, and external rotation, whereas impingement produces pain only within a specific arc while the rest of the range is preserved.
Our Approach at Yonsei SM Pain Clinic
The key to impingement syndrome is ‘expanding the space.’ We treat by functionally creating space without structural surgery.
- Phase 1: Calm (Circulation HD)
Stabilize inflamed bursa and tendon area. Precise ultrasound-guided procedure reduces swelling when needed. - Phase 2: Activate (Circulation PT)
Strengthen scapula-stabilizing muscles (lower trapezius, serratus anterior) and relax overtense upper trapezius to normalize scapula position. - Phase 3: Integrate
Correct rounded shoulders and learn proper scapulohumeral rhythm when lifting arm. This enables lifting arm without impingement.
Why don’t we look only at the shoulder?
Shoulder impingement occurs when scapular stability is compromised. Scapular stability, in turn, depends on core strength and thoracic mobility. When the thoracic spine is stiff, the shoulder joint has to compensate with excessive motion. When the core is weak, the scapula becomes unstable and the subacromial space narrows. That is why at Yonsei SM Pain Clinic, we evaluate thoracic mobility and core stability as part of every shoulder assessment.
Key Posture Correction Points
Most important for preventing and treating impingement syndrome is shoulder and scapula position.
Problematic Postures
- Rounded shoulders rolling forward
- Forward head posture
- Shrugging shoulders when lifting arm
- Rounded back posture
Correct Posture
- Shoulder blades flat against back
- Shoulders positioned behind ears
- Keep shoulders down, lift only arm
- Thoracic spine naturally extended
What is Scapulohumeral Rhythm?
When lifting arm, humerus and scapula must move together in 2:1 ratio. When this rhythm breaks, impingement occurs. Circulation PT trains to restore this rhythm.
Frequently Asked Questions
Why pain only at certain angles?
There may be angles during arm lifting where tendon gets more compressed. Evaluating pain angle with posture and scapula movement helps find the cause. Arm Raising Q&A →
Is shoulder noise impingement syndrome?
You can’t determine the cause from noise alone. Evaluation is needed if the noise comes with pain or a catching feeling. Clicking Sound Q&A →
How to distinguish from frozen shoulder?
Frozen shoulder involves movement restriction itself from stiffened capsule, while impingement typically shows pain at specific movements and angles. We look at range and pain pattern together. Differentiation Q&A →
Can it progress to rotator cuff tear?
Repeated impingement can accumulate burden on tendon. Good to establish treatment direction after evaluation if pain persists or function decline accompanies. Rotator Cuff Tear Page →
How should I exercise my shoulder?
Range-of-motion exercises appropriate to current stage and scapula stabilization routine are important. Excessive exercise can worsen, safer to establish routine after evaluation. Shoulder Routine Q&A →
Worse at night, is it shoulder problem?
Night pain can appear in impingement or tendon issues too. May need differentiation from frozen shoulder and other conditions, so we check pain pattern and movement together. Night Pain Q&A →
Can I keep getting injections?
Injection repeat plans vary by type and purpose. Important to design addressing patterns causing impingement and function recovery together rather than just briefly reducing symptoms. Injections Q&A →
Better then painful again, why does it repeat?
If same movement patterns repeat in daily life, burden can accumulate on tendon again. Important to change patterns causing recurrence along with pain control. Recurrence Q&A →
References
- Lim JK et al. Subacromial impingement syndrome. Clin Shoulder Elb. 2019;22(2):57-59.
- Diercks R et al. Guideline for diagnosis and treatment of subacromial pain syndrome: a multidisciplinary review by the Dutch Orthopaedic Association. Acta Orthop. 2014;85(3):314-322.
- Lewis J. Rotator cuff related shoulder pain: assessment, management and uncertainties. Man Ther. 2016;23:57-68.
- Haik MN et al. Scapular kinematics pre and following shoulder impingement exercise protocol: a randomised controlled trial. J Orthop Sports Phys Ther. 2014;44(6):475-487.
- Quek J, Pua YH, Clark RA, Bryant AL. Effects of thoracic kyphosis and forward head posture on cervical range of motion in older adults. Man Ther. 2013;18(1):65-71. PMID 22959228
- Sheikhhoseini R, Shahrbanian S, Sayyadi P, O’Sullivan K. Effectiveness of therapeutic exercise on forward head posture: a systematic review and meta-analysis. J Manipulative Physiol Ther. 2018;41(6):530-539. PMID 30107937
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Catching and pain when lifting arm?
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