Shoulder Cracking and Popping: Causes, When to Worry, and What It Means
- 4 days ago
- 6 min read
Written by Dr. Jeffrey Peng, MD — Board-Certified Sports Medicine Physician
Published: March 2, 2026 | Last Updated: March 2, 2026
Shoulder cracking and popping sounds can be unsettling, especially when they seem to come out of nowhere. Many patients walk into my clinic concerned that a click or pop in their shoulder means something is seriously wrong — perhaps a rotator cuff tear or the beginning of arthritis. The good news is that in the vast majority of cases, these mechanical symptoms are completely harmless. However, there are situations where shoulder clicking can signal an underlying issue that deserves attention. In this article, I will walk through the most common reasons your shoulder makes these sounds, explain how to distinguish normal joint noise from something more concerning, and outline what the current research tells us about the clinical significance of shoulder clicking and popping.
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Why Does My Shoulder Click or Pop?
Shoulder cracking and popping sounds are extremely common, and in most cases, these mechanical symptoms are not a sign of a significant problem. It is important to understand that while these sounds might seem alarming, they can often be attributed to several non-pathological causes — even in individuals with no shoulder pain or dysfunction whatsoever.
One of the most common explanations for shoulder clicks or pops involves normal anatomical variations within the shoulder joint. As the rotator cuff tendons — particularly the supraspinatus tendon — move underneath the coracoacromial arch during shoulder motion, it is possible for these tissues to make brief contact with surrounding structures. The subacromial space is a narrow passage between the top of the humeral head and the arch formed by the acromion, coracoid process, and coracoacromial ligament. Normal anatomical variations such as a naturally tight subacromial space, minor bursal thickening, or subtle bony differences can all contribute to sensations like clicking, popping, or catching as the tendons and bursa glide during movement. In the absence of pain or functional limitation, these mechanical symptoms are generally considered benign.
When Should You Worry About Shoulder Clicking?
When clicking or popping is accompanied by pain, weakness, or restricted range of motion, it may suggest something more concerning — such as subacromial impingement, rotator cuff tendinopathy, or a partial- or full-thickness rotator cuff tear. In these situations, the mechanical sounds may be caused by inflamed or damaged soft tissue rubbing against nearby structures. However, the presence of clicking alone does not reliably predict structural pathology.
A 2024 prospective study published in the Journal of Shoulder and Elbow Surgery examined 100 patients with suspected rotator cuff pathology and found that subjective mechanical symptoms like clicking or popping were not associated with full-thickness rotator cuff tearing, biceps tendon subluxation, or other MRI-confirmed abnormalities (Zhang et al., 2024). As a diagnostic test for full-thickness rotator cuff tearing, subjective shoulder mechanical symptoms demonstrated poor diagnostic accuracy. This means that while clicking accompanied by pain should prompt further evaluation, it is not a definitive sign of rotator cuff damage — and imaging and clinical assessment remain essential for an accurate diagnosis.
Can Shoulder Osteoarthritis Cause Clicking and Popping?
Shoulder clicking and popping can sometimes be a symptom of glenohumeral osteoarthritis. In osteoarthritis, the smooth cartilage lining the surfaces of the shoulder joint gradually wears down, leading to increased joint friction, irregular surfaces, and the formation of bone spurs (osteophytes). These changes can result in mechanical grinding, clicking, or popping during shoulder motion — particularly when the arm is raised, rotated, or moved across the body. Patients often describe these sensations as crepitus, and over time, they may notice increasing stiffness, loss of range of motion, or deep aching pain that worsens with activity.
From a biomechanical standpoint, as cartilage degenerates, the joint no longer moves as smoothly. Micromotion between the humeral head and glenoid becomes less controlled, which can lead to intermittent catching or clicking as the joint surfaces interact unevenly. Osteophytes that form along the joint margins can also contribute to these symptoms by impinging on soft tissues or physically limiting the joint's normal excursion. While mild crepitus may occur even in asymptomatic individuals — especially with aging — persistent or painful clicking accompanied by stiffness or reduced function should raise suspicion for underlying degenerative joint disease. Evaluation typically includes physical examination and imaging such as X-rays, which can reveal joint space narrowing, subchondral sclerosis, and osteophyte formation — all hallmarks of glenohumeral osteoarthritis.
What Is Snapping Scapula Syndrome?
Another less common cause of clicking in the shoulder region is snapping scapula syndrome. This condition occurs when there is abnormal contact or friction between the underside of the scapula and the rib cage during shoulder movement. Patients often describe a grinding, snapping, or popping sensation near the shoulder blade, sometimes accompanied by discomfort or a feeling of something catching with motion. While relatively uncommon in the general population, snapping scapula is seen more frequently in individuals who perform repetitive overhead or throwing motions — such as swimmers, baseball players, weightlifters, or rowers — where the scapula is in constant motion against the thoracic wall.
Normal scapulothoracic movement requires a smooth interface between the scapula and the rib cage, maintained by the surrounding musculature and cushioning from the scapulothoracic bursa. When this interface is disrupted — whether from poor posture, scapular dyskinesis, muscle imbalances, or inflammation of the bursa — it can lead to audible or palpable snapping. In my practice, I see this condition most often in overhead athletes and individuals with poor scapular mechanics. While snapping scapula syndrome may be benign in some individuals, persistent symptoms should be evaluated, especially if they interfere with daily activities or athletic performance.
Can Joint Hypermobility Cause Shoulder Popping?
An often-overlooked reason for shoulder clicking or popping involves joint hypermobility. In some individuals, hypermobility spectrum disorders can lead to mechanical symptoms without any underlying structural damage. The issue in these cases is not inflammation or tissue injury, but rather excessive joint laxity. When the ligaments and connective tissues that stabilize the shoulder are more elastic than usual, the joint can move beyond its normal range, allowing for more frequent and sometimes more noticeable joint sounds as structures shift and reposition with motion.
People with hypermobility often report frequent cracking or popping in their shoulders, even in the absence of pain or dysfunction. This is particularly common in younger individuals, dancers, gymnasts, or those with naturally flexible joints. While the sounds themselves are usually harmless, persistent instability or symptoms like frequent subluxations, fatigue, or discomfort with overhead activity might suggest a more complex underlying connective tissue disorder, such as Ehlers-Danlos syndrome or generalized joint hypermobility. If you experience frequent shoulder instability events alongside clicking, it is worth discussing with a healthcare professional to rule out these conditions.
How Common Are Shoulder Findings in People Without Pain?
Perhaps the most important takeaway from the research is that mechanical symptoms like shoulder clicking and popping are incredibly common — even in people with no shoulder pain at all. Structural "abnormalities" are frequently detected on imaging in asymptomatic individuals. An ultrasound-based study published in the American Journal of Roentgenology found that 96% of asymptomatic men had detectable shoulder findings on ultrasound, including subacromial-subdeltoid bursal thickening and signs of acromioclavicular joint osteoarthritis (Girish et al., 2011). This tells us that shoulder clicking or popping often occurs in the absence of any clinically significant pathology. These noises are frequently just part of the normal variation in human anatomy and tissue movement, particularly in active individuals or those with more mobile joints.
When to See a Doctor for Shoulder Clicking
While most cases of shoulder cracking and popping are benign and do not require treatment, it is important to listen to your body. If those sounds are consistently accompanied by pain, weakness, instability, or a noticeable decline in function, it may be worth seeking evaluation by a healthcare professional. In those situations, further assessment — such as a thorough physical examination or imaging — can help determine whether an underlying issue like rotator cuff pathology, bursitis, or joint degeneration may be contributing to your symptoms.
For the vast majority of people, hearing a pop or click during shoulder movement is not a cause for concern — it is simply the body doing what it is designed to do. In my practice, I often reassure patients that clicking alone, without accompanying symptoms, rarely indicates a serious structural problem. If you are experiencing shoulder pain alongside clicking or popping, consider scheduling an appointment so we can perform a proper evaluation and develop a treatment plan tailored to your needs.
References
Zhang D, Dyer GSM, Earp BE. The significance of subjective mechanical symptoms in rotator cuff pathology. Journal of Shoulder and Elbow Surgery. 2024;33(11):2441-2447. doi:10.1016/j.jse.2024.02.024
Girish G, Lobo LG, Jacobson JA, Morag Y, Miller B, Jamadar DA. Ultrasound of the shoulder: asymptomatic findings in men. AJR American Journal of Roentgenology. 2011;197(4):W713-W719. doi:10.2214/AJR.11.6971
Disclaimer: This content is for educational purposes only and does not constitute medical advice. It does not substitute for the medical advice of a physician. Always seek the advice of your physician with any questions you may have regarding your health. Dr. Peng's content reflects his own opinion and does not represent the views of his employers or affiliated hospital systems.
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