Shoulder Pain: Causes, Symptoms, Diagnosis & Treatment

Written by Dr Ajay Shakya, BPT, MPT (Neurological Conditions) | Published: August 2026. All clinical content is cross-referenced against peer-reviewed literature and current physiotherapy practice. See References below.

Quick Summary: 

Shoulder pain is the third most common musculoskeletal complaint after back and neck pain, affecting up to a quarter of adults at some point. Most cases stem from mechanical issues within the shoulder, especially involving the rotator cuff muscles, the joint capsule, or referred discomfort from a pinched nerve in the neck. Because nerve pathways overlap, shoulder pain—especially on the left side—can sometimes signal a cardiac event, such as a heart attack, rather than a muscle strain. Understanding the root causes and specific risk factors for shoulder pain in women helps guide effective management. With proper diagnosis, targeted physical therapy, and daily exercises, most shoulder conditions can be resolved safely. Recognizing key red-flag symptoms is essential to know when to seek urgent care.

What Is the Shoulder?

The shoulder is the most flexible joint in the human body because it has deliberately sacrificed structural stability to achieve a great deal of range of motion. Instead of having a single deep socket, it works as a group of four separate joints: the main ball-and-socket glenohumeral joint, the acromioclavicular (AC) joint located at the top of the shoulder blade, the sternoclavicular joint at the breastbone, and the sliding scapulothoracic joint situated across the back of the rib cage. 

The main socket is remarkably shallow and holds only about one-third of the ball from the upper arm bone, so the shoulder has very little natural bone support. In this way, it relies almost entirely on the surrounding soft tissues for stability, including the four rotator cuff muscles, the supporting ligaments, and the various upper back muscles that control the shoulder blade. It is exactly this evolutionary trade-off between a high degree of mobility and minimal physical alignment that makes the shoulder so susceptible to strain, overuse injuries, and chronic pain.

What Is Shoulder Pain?

Shoulder pain refers to any discomfort in or around the shoulder joint, ranging from a slight ache after overuse to sharp, intense pain that makes simple everyday activities, such as dressing or raising the arms, difficult. It is an extremely common problem, affecting approximately 16% of adults worldwide and ranking third in frequency among muscle and joint complaints, after back and neck pain. Instead of being a single condition, shoulder pain is a general symptom that may have its source in the joint itself, in the surrounding muscles and tendons, or even in completely different parts of the body, for example, from a pinched nerve in the neck or, in rare instances, from internal organs such as the heart.

Causes of Shoulder Pain

• Shoulder Impingement: Pinching of the rotator cuff tendons or tissue at the top of the shoulder. Pain worsens with overhead reaching or when sleeping on that side.
• Rotator Cuff Tendon Damage or Tears: Wear and tear, or injury to the main tendons supporting the arm, caused by age, sudden injury, or repeated movements over time.
• Frozen Shoulder: The joint capsule thickens and tightens, causing severe stiffness that limits movement in all directions. It develops slowly over months and is more common in people with diabetes or thyroid issues.
• AC Joint Problems & Arthritis: Causes sharp pain right at the top tip of the shoulder, especially when reaching across your chest.
• Joint Instability & Tear Risks: Common in younger athletes, where the shoulder feels loose or suffers a tear in the surrounding cartilage (labrum).
• Pain Coming From Somewhere Else: Sometimes pain isn't a shoulder issue at all—it can be "referred" from a pinched nerve in the neck, or rarely from internal organs like the heart or gallbladder.

Causes of Shoulder Pain in Females

Why Women Experience More Shoulder Pain

• Women are more likely than men to report shoulder pain, with about one in five middle-aged women experiencing it at any one time.
• The age group most likely to experience shoulder pain is the 40s and 50s.

Main Causes and Related Factors

• The most powerful factors are pain resulting from previous shoulder injuries, pain in the upper back and neck muscles, nerves being compressed in the neck, and loss of bone.
• Factors that have nothing to do with the issue show that posture problems and diabetes are not directly connected to shoulder pain in middle-aged women.

Biological Reasons

• Hormonal fluctuations during menopause lead to hormonal alterations that are often associated with "frozen shoulder" (a joint that is extremely stiff and painful).
• Reduced structural support from bone loss (osteoporosis) and natural muscle loss weakens the shoulder, making it more difficult for the body to protect the joint from the effects of everyday use.

Causes of Left Shoulder Pain

Musculoskeletal vs. Cardiac Origins

• Left shoulder pain is most commonly caused by mechanical issues such as rotator cuff irritation, frozen shoulder, AC joint disorders, or muscle strains—particularly if the pain worsens with movement or changes in position.

• Pain referred from the heart: in the case of a heart attack or angina, pain signals travel along the same nerve pathways, and so the brain interprets the pain in the left shoulder, arm, jaw, or upper back rather than in the chest.

Gender-Specific Symptoms & Red Flags

• In the case of women, those with acute coronary syndrome are much more likely than men to report shoulder pain, arm pain, shortness of breath, nausea, vomiting, fatigue, and palpitations.
• When cardiac involvement should be suspected: Although most left shoulder pain is not of cardiac origin, cardiac problems should still be ruled out if the pain lacks a clear mechanical cause or is accompanied by chest tightness, shortness of breath, sweating, or nausea.

Clinical tip: Shoulder pain due to heart problems generally presents as a steady, heavy pain that does not vary with movement and is usually accompanied by other symptoms, such as chest pressure or shortness of breath. On the other hand, musculoskeletal shoulder pain is usually reproducible in that it increases with certain movements or positions and improves with rest. If you are uncertain, treat it as an emergency and have it examined.

The Neck-Shoulder Connection

Since the neck and shoulders share the same nerves and muscles, it can be difficult to distinguish between them during an assessment. Nerve roots that are irritated in the neck (a condition known as cervical radiculopathy) usually cause pain to go straight down into the shoulder and upper arm. Moreover, people tend to tense up and raise their shoulders to protect a painful neck, which can lead to secondary shoulder pain over time.

Doctors use quick physical tests to check if a pinched nerve in your neck is causing your pain:

• Spurling Test: Gently turning your neck and pressing down on your head triggers pain if a nerve in your neck is pinched.
• Hand-on-Head Relief: Resting the palm of your painful arm on top of your head takes pressure off the nerve and reduces symptoms.
• Key Signs of a Neck Issue:

1. Moving your neck changes the intensity of your shoulder pain.
2. You feel numbness or tingling that travels past your elbow into your hand.

• Main Takeaway: If these signs are present, your neck—not your shoulder—is the root problem and needs targeted treatment.

Signs and Symptoms

• Rotator Cuff / Impingement: Pain triggered by overhead reaching that improves with rest.
• Frozen Shoulder (Adhesive Capsulitis): Constant, dull pain paired with progressive stiffness in both active and passive motion ( restriction when someone else moves the arm).
• Labral Issue or Rotator Cuff Tear: Sharp pain accompanied by catching, clicking, or popping sensations during movement.
• Complete Rotator Cuff Tear: True loss of lifting strength (distinct from effort limited purely by pain).
• Cervical (Neck) Involvement: Numbness or tingling radiating down the arm and into the hand.
• Universal Feature: Night pain—especially when lying on the affected side—is common across almost all shoulder conditions.

Diagnosis

Diagnostic Steps

• History and examination involve taking a thorough history (including onset, triggers, injury, and any red flags) and performing physical examinations to assess range of motion, strength, and provocative tests.
• The cervical screening involves assessing neck mobility and nerve tension (for example, the Spurling test) to exclude neck-related causes.

Orthopedic Special Tests

When it comes to diagnosing things, tests are usually more effective at excluding a condition (because they have high sensitivity) than at confirming it (since their specificity is only moderate).

• Neer's Sign has a sensitivity of 78% and a specificity of 58% for subacromial impingement (a negative result considerably reduces the probability).
• Hawkins-Kennedy has a sensitivity of 74% and a specificity of 57%.
• Empty Can (Jobe's) has a sensitivity of 69% and a specificity of 62%.

When making a decision, specific tests (for example, the Drop Arm test) are more useful for confirming impingement or full-thickness rotator cuff tears when they are positive.

Imaging Indications

• It is not necessary to handle every case of shoulder pain.
• X-rays are used for assessing bone spurs, arthritis, or calcific deposits.
• Ultrasound and MRI are used for evaluating rotator cuff tears, labral damage, problems with the joint capsule, or cases that do not respond to conservative treatment.

Management and Treatment

First Line Treatment: Physical Therapy

• High Success Rate: Most shoulder conditions (impingement, tendon issues, early frozen shoulder) resolve with non-surgical physical therapy instead of plain rest.

• Core Components:

1. Hands on therapy: Gentle joint and muscle work to ease pain and improve movement.
2. Targeted strengthening: Building up the rotator cuff and upper back muscles.
3. Activity modification: Adjusting daily movements to protect the joint while it heals.

The Importance of Shoulder Blade Control

• Proper Motion: The shoulder blade must rotate smoothly for the arm to reach overhead safely.

• Preventing Pinching: Retraining these stabilizing muscles stops tendons from getting compressed, making shoulder blade exercises a central part of recovery.

Next Steps for Stubborn Pain

• Cortisone Injections: Can temporarily reduce severe inflammation, allowing you to continue physical therapy comfortably.

• Specialist Evaluation & Surgery: Reserved for large rotator cuff tears, severe frozen shoulder, or cases that fail to improve after weeks of rehab. Options include arthroscopic repairs or minor procedures to create space in the joint.

Shoulder Pain Exercises

Exercise is one of the best-supported treatments for shoulder pain, but the right exercise depends on the stage and cause of the problem. Gentle mobility work is appropriate for an acutely painful or frozen shoulder, progressing to resistance-based strengthening as pain subsides and range of motion improves. The table below outlines a general starting sequence commonly used in physiotherapy for impingement-related and general mechanical shoulder pain. A physiotherapist should tailor sets, reps, and exercise selection to your specific diagnosis.

Exercise	Purpose	Sets x Reps
Pendulum swings	Gentle mobility, reduces stiffness in acute/painful phase	2 x 30 seconds each direction
Doorway pectoral stretch	Improves anterior shoulder flexibility	3 x 20-30 second hold
Scapular retractions (squeeze shoulder blades)	Improves scapular control and posture	3 x 12-15
External rotation with resistance band	Strengthens infraspinatus/teres minor (rotator cuff)	3 x 12-15
Internal rotation with resistance band	Strengthens subscapularis (rotator cuff)	3 x 12-15
Wall slides	Restores overhead range of motion with scapular control	3 x 10
Prone "Y" and "T" raises	Strengthens lower trapezius and scapular stabilizers	3 x 10-12

It is more important to be consistent than intense, particularly in the early stages. The following is an example of a weekly schedule for the first few weeks of a home exercise program:

Day	Focus
Monday	Mobility (pendulum, doorway stretch) + scapular retractions
Tuesday	Rest or light stretching only
Wednesday	Resistance band external/internal rotation + wall slides
Thursday	Rest or light stretching only
Friday	Full routine: mobility + strengthening + Y/T raises
Saturday / Sunday	Rest, gentle mobility if stiff

A clinical tip for rehabilitation is that mild discomfort is generally acceptable as long as it resolves within 24 hours; however, if you experience sharp pain, pain that persists beyond 24 hours, or a new onset of weakness, you should reduce your activity and consult your physiotherapist.

Prognosis of Shoulder Pain

The outlook for most shoulder pain is good, especially when addressed early with physiotherapy. Impingement-type pain and mild rotator cuff tendinopathy often improve substantially within 6 to 12 weeks of consistent rehabilitation. Frozen shoulder has a prolonged course—its three stages can span several months to a few years—but most people eventually regain functional, often full, range of motion, especially with physiotherapy support. Full-thickness rotator cuff tears and cases unresponsive to conservative treatment have a more variable prognosis and may need surgical repair. Recovery and return to full strength typically take several months of structured rehabilitation. Chronic or long-standing shoulder pain, and cases with significant cervical spine involvement, take longer to resolve and benefit from treatment addressing both regions together rather than the shoulder alone.

Preventive Measures

Key Prevention Strategies for Shoulder Pain

• Strengthen the main muscles by carrying out regular resistance exercises, particularly for the rotator cuff and the scapular stabilizers, if you are engaged in repetitive overhead sports or work.
• It's important to maintain good posture by avoiding positions where your head juts forward and your shoulders round when you're at your desk or using a phone, as this can cause chronic strain in your neck and shoulders.
• To warm up properly before heavy lifting or overhead sports, do not suddenly increase training intensity, and take regular breaks during repetitive overhead activities.
• To prevent recurrence, it is necessary to keep up with a maintenance exercise program even after the symptoms have disappeared in order to lower the chance of having further pain episodes.

When Should You See a Doctor?

Seek Standard Medical Evaluation (Physiotherapist or Physician)

• Trauma results from pain caused by a fall or a serious injury.
• Physical findings include visible deformity, numbness, tingling, or weakness that radiates down the arm into the hand.
• Functional loss means being entirely unable to move the arm, experiencing severe pain, or suffering from a weakness that is rapidly getting worse.
• The pain continues for more than 2 to 3 weeks even when rest and basic self-care are taken.

Seek Emergency Care Immediately

Call emergency services if shoulder pain (especially on the left side) occurs alongside:

• Chest pain, pressure, or tightness
• Shortness of breath
• Nausea or vomiting
• Cold sweats, dizziness, or lightheadedness

FAQs

How to cure shoulder pain?

Most shoulder pain isn't “cured” with a single fix but improves steadily with a structured physiotherapy program combining manual therapy, progressive strengthening of the rotator cuff and scapular muscles, and temporary activity modification. Ice or heat, over-the-counter anti-inflammatory medication, and — for select cases — corticosteroid injections can help manage symptoms while the underlying rehabilitation takes effect. Severe structural problems like a full-thickness rotator cuff tear may need surgical repair.

How can I tell if my shoulder pain is serious?

Pain following significant trauma, visible deformity, complete inability to move the arm, severe or rapidly worsening weakness, or numbness spreading down the arm are all signs that need prompt medical evaluation. Separately, shoulder pain paired with chest tightness, breathlessness, nausea, or sweating should be treated as a possible cardiac emergency and assessed immediately, not monitored at home.

What is the best exercise for shoulder pain?

There's no single “best” exercise — the right starting point depends on the cause and current irritability of the shoulder. Gentle pendulum swings and scapular retractions are usually safe early options, progressing to resistance-band external and internal rotation and scapular strengthening exercises like wall slides and Y/T raises as pain allows. A physiotherapist can identify which specific exercises match your diagnosis and stage of recovery.

What causes shoulder pain without injury?

Shoulder pain often develops gradually without a specific injury, most commonly due to repetitive overhead movements, prolonged poor posture, age-related tendon degeneration, or the development of frozen shoulder. Referred pain from the cervical spine is another common injury-free cause, and — though less common — unexplained shoulder pain, particularly on the left side with other symptoms, can also reflect a cardiac issue rather than a shoulder problem at all.

Can stress cause shoulder pain?

Yes — psychological stress commonly leads to sustained tension in the upper trapezius and surrounding shoulder girdle muscles, which can produce a persistent dull ache or tightness across the top of the shoulder and into the neck, independent of any structural joint problem.

Is it okay to exercise with shoulder pain?

Gentle, pain-guided movement is usually better than complete rest, which can lead to stiffness, especially in conditions like frozen shoulder. The general guide is that mild discomfort settling within a day is acceptable, while sharp pain, pain lasting more than 24 hours, or new weakness means the activity should be scaled back and discussed with a physiotherapist.

How long does shoulder pain usually last?

This varies widely by cause. Mild strain or impingement-type pain often improves within a few weeks with appropriate rehabilitation, whereas frozen shoulder can take many months to a few years to fully resolve as it progresses through its three stages. Persistent pain beyond two to three weeks despite home measures is a reasonable point to seek a professional assessment.

Can poor posture cause shoulder pain?

Yes. Prolonged forward-head, rounded-shoulder posture — common with desk work and phone use — alters normal scapular positioning and shoulder mechanics, increasing strain on the rotator cuff and contributing to both shoulder and neck pain over time.

Does sleeping position affect shoulder pain?

Sleeping directly on the affected shoulder is one of the most commonly reported aggravating factors across nearly all shoulder conditions, from rotator cuff tendinopathy to frozen shoulder. Switching to the opposite side or sleeping on your back with support under your arm often reduces nighttime pain.

Get Expert Help for Persistent Shoulder Pain:

If self-care exercises aren't resolving your shoulder discomfort, a professional assessment can pinpoint the exact cause. Book a consultation with Dr. Ajay Shakya at Physio Health and Wellness in Vaishali Nagar, Jaipur, Rajasthan, for a customized recovery plan.

References

1. Karel Y, et al. A systematic review of the global prevalence and incidence of shoulder pain. BMC Musculoskeletal Disorders. Available at: PMC9730650
2. Khosravi F, et al. Shoulder pain prevalence and risk factors in middle-aged women: A cross-sectional study. Available at: PubMed 31733758
3. Ferry AV, et al. Symptoms of Infarction in Women: Is There a Real Difference Compared to Men? A Systematic Review with Meta-Analysis. Available at: PMC8910933
4. Shoulder Pain—Is It From the Shoulder, Neck, or Both? Current Sports Medicine Reports. Available at: PMC6370395
5. Diagnostic accuracy of clinical tests for subacromial impingement syndrome: a systematic review and meta-analysis. NCBI Bookshelf. Available at: NBK91532
6. Shoulder Impingement Pain Syndrome: Pathophysiology, Diagnosis, and a Review of Current Treatment Strategies. Available at: PMC12514857
7. Cognitive functional therapy versus therapeutic exercises for the treatment of individuals with chronic shoulder pain: A protocol for a randomized controlled trial. Available at: PMC12011251

Medical Disclaimer: This article is intended for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified physiotherapist or physician regarding any medical condition, and seek emergency care immediately if you suspect a heart attack.

DR

Ajay Shakya

BPT, MPT (Neurological Conditions) · 10+ years of experience

Certified physiotherapist and manual therapist with over 10 years of clinical experience. Specializes in neurological rehabilitation, back pain, neck pain, and sports injuries.

BPT Graduation MPT, Neurological Certified Manual Therapist

Physio Health and Wellness — Vaishali Nagar, Jaipur

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