Shoulder pain can make everyday activities difficult, especially when reaching overhead, putting on a shirt, sleeping on your side, or participating in sports. Two of the most commonly confused causes of shoulder pain are rotator cuff tears and frozen shoulder (also called adhesive capsulitis).
The fastest way to tell the two apart is to compare active motion (what you can do on your own) with passive motion (what someone else can do for you). A rotator cuff tear usually causes pain or weakness when you try to lift the arm yourself, but the shoulder can often still be moved through a fairly normal range by another person. Frozen shoulder restricts both active and passive motion, meaning the shoulder feels stuck no matter who is moving it. Because the two conditions can overlap and even occur together, a physical exam by an orthopaedic specialist is the only reliable way to confirm which one you have.
Although these conditions can produce similar symptoms, they affect the shoulder differently. A rotator cuff tear is an injury to one or more of the tendons that move and stabilize the shoulder. Frozen shoulder causes the joint capsule itself to become painful, thickened, and stiff, resulting in a significant loss of motion.
Understanding the differences may help you recognize when shoulder pain warrants an evaluation by an orthopaedic shoulder specialist.
Table of Contents
Understanding Shoulder Pain
Shoulder pain can have many causes, including rotator cuff injuries, frozen shoulder, arthritis, bursitis, instability, and other conditions. Two of the most commonly confused conditions are rotator cuff tears and frozen shoulder.
The symptoms can overlap. Both can cause shoulder pain, difficulty reaching overhead, nighttime discomfort, and problems with normal activities. The difference is usually most noticeable in shoulder strength and range of motion.
A rotator cuff problem can make it painful or difficult to lift the arm because the muscles and tendons responsible for shoulder movement are injured or weakened. With frozen shoulder, the joint itself becomes increasingly stiff, limiting both active and passive movement.
This distinction matters because the treatment for a rotator cuff tear can look very different from the treatment for adhesive capsulitis.
What Is a Rotator Cuff Tear?
A rotator cuff tear is an injury to one or more of the four muscles and tendons that stabilize the shoulder and allow you to lift and rotate your arm. The rotator cuff acts like a sleeve around the top of the upper arm bone, holding it securely in the shoulder socket.
A tear can develop gradually as a tendon wears down over time, or it can happen suddenly after an injury such as a fall or lifting something heavy. Repetitive overhead activity, including certain sports and occupational tasks, may also contribute to rotator cuff problems, and the risk rises with age as blood flow to the tendons naturally decreases.
According to the American Academy of Orthopaedic Surgeons (AAOS), rotator cuff tears can be partial or complete, and not every tear requires surgery. Treatment is contingent on factors such as the size and location of the tear, the cause of the injury, your age, activity level, overall health, and how much the symptoms impede daily life. Individuals over 40 are at the highest risk, since degenerative tears become more common as tendons age.
Common symptoms of a rotator cuff tear or other rotator cuff injury include:
- Pain when lifting or lowering the arm
- Weakness when lifting or rotating the shoulder
- Pain that becomes worse at night
- Difficulty reaching overhead or behind the back
- Pain when lying on the affected shoulder
- A clicking, popping, or grinding sensation during movement
- Difficulty performing activities that require shoulder strength
A rotator cuff tear does not always cause severe pain. Some tears, particularly degenerative tears that develop slowly over time, may cause relatively mild symptoms.
What Is Frozen Shoulder?
Frozen shoulder, medically known as adhesive capsulitis, occurs when the connective tissue surrounding the shoulder joint becomes inflamed, thickened, and tight. As the condition progresses, the shoulder becomes increasingly difficult to move. Unlike a rotator cuff tear, it is primarily characterized by stiffness and loss of motion rather than a specific tendon injury.
Frozen shoulder typically develops through three stages.
The Freezing Stage
During the freezing stage, shoulder pain gradually increases and movement becomes more difficult. Pain is often most noticeable at night and can last anywhere from a some weeks to several months.
The Frozen Stage
During the frozen stage, pain may begin to ease, but significant stiffness remains. Everyday activities such as reaching into a cabinet, getting dressed, or fastening a seatbelt can become difficult.
The Thawing Stage
During the thawing stage, shoulder movement gradually returns. Recovery can take months and, in some cases, considerably longer, with some cases lasting one to three years from start to finish.
The AAOS notes that frozen shoulder is more common among people aged 40 to 60. People with diabetes or thyroid conditions also have an increased risk, and Mayo Clinic points out that frozen shoulder can develop after the shoulder has been immobilized following an injury or surgery; women are affected more often than men.
The Key Difference in Symptoms
The most useful distinction between a rotator cuff tear and frozen shoulder is often the difference between weakness and stiffness.
With a rotator cuff tear, you may have difficulty lifting your arm because of pain or weakness. However, the shoulder may still have a relatively normal passive range of motion, meaning another person can move your arm farther than you can.
With frozen shoulder, both active and passive range of motion are restricted. In other words, you may not be able to move the shoulder yourself fully, and a physician cannot simply move it through its normal range either.
This difference is one of the main reasons a hands-on orthopaedic examination is so important for an accurate diagnosis.
Rotator Cuff Tear vs Frozen Shoulder Comparison Table
| Symptom or Finding | Rotator Cuff Tear | Frozen Shoulder |
|---|---|---|
| Primary problem | Tendon injury | Joint capsule stiffness |
| Pain | Common | Common, especially early |
| Weakness | Common | May occur because of pain and limited use |
| Stiffness | May occur | Usually pronounced |
| Active range of motion | May be limited | Limited |
| Passive range of motion | Often better preserved | Also significantly limited |
| Night pain | Common | Common |
| Onset | Can be sudden or gradual | Usually develops gradually |
| Common treatment | Physical therapy, medication, injections, or surgery, depending on the tear | Physical therapy, pain management, injections, and occasionally surgery |
This comparison can offer useful clues, but symptoms alone cannot confirm a diagnosis. Several shoulder conditions can produce similar symptoms, and some people have more than one shoulder problem at the same time, such as a rotator cuff tear that leads to stiffness because of disuse.
How Are Rotator Cuff Tears and Frozen Shoulder Diagnosed?
Diagnosis begins with a medical history and physical examination.
One of our specialists at Vero Orthopaedics will evaluate shoulder strength, pain, flexibility, and range of motion. Comparing active and passive movement is particularly helpful for determining whether stiffness originates in the joint capsule or is more consistent with a rotator cuff problem.
Imaging may also be recommended depending on symptoms and exam findings. X-rays can help identify arthritis, bone abnormalities, or other structural problems. At the same time, ultrasound and MRI provide detailed information about the shoulder’s soft tissues and can help confirm a rotator cuff tear.
The AAOS notes that a physical examination can help diagnose rotator cuff tears, and that MRI or ultrasound can increase diagnostic accuracy when used alongside the clinical exam.
Frozen shoulder is generally diagnosed based on the characteristic pattern of pain and restricted active and passive motion. Imaging is not always necessary to diagnose frozen shoulder, but it may be used to rule out other causes of shoulder pain and stiffness, such as arthritis or a rotator cuff tear.
Treatment for Rotator Cuff Tears and Frozen Shoulder
Treatment depends on the underlying condition, symptom severity, and individual goals.
Rotator Cuff Treatment
Not every rotator cuff tear requires surgery. Depending on the injury, treatment may include activity modification, physical therapy, anti-inflammatory medication, injections, and other nonsurgical approaches.
Surgery may be considered when a tear causes persistent symptoms, significant weakness, or functional limitations that do not improve with appropriate nonsurgical treatment. The type of tear and the patient’s overall circumstances also have a role in determining whether surgery is appropriate. When surgery is recommended, arthroscopic rotator cuff repair may be used to reattach the damaged tendon to the upper arm bone.
Frozen Shoulder Treatment
Treatment for frozen shoulder generally focuses on controlling pain and slowly restoring shoulder motion.
Physical therapy is a central part of treatment. A physical therapist can build a stretching and range-of-motion program to improve mobility without unnecessarily aggravating the shoulder. Depending on symptoms, treatment may also include anti-inflammatory medication or a corticosteroid injection.
Surgery is not usually the first treatment for frozen shoulder. When symptoms remain severe and motion does not improve with nonsurgical care, procedures such as manipulation under anesthesia or arthroscopic capsular release may be considered.
Diagnosis and Treatment at Vero Orthopaedics
Shoulder pain does not always come with an obvious explanation. A shoulder that hurts when you lift your arm could point to a rotator cuff problem, frozen shoulder, arthritis, or another condition entirely. Getting the diagnosis right is essential to choosing the right treatment.
Our shoulder specialists evaluate shoulder pain, stiffness, weakness, and limited mobility, then build treatment plans based on each patient’s specific condition and goals. Our team treats a wide range of shoulder conditions, including rotator cuff injuries and frozen shoulder, using both nonsurgical and surgical options.
Treatment may include physical therapy, medications, injections, activity modification, or surgery when appropriate. When surgery is necessary, our orthopaedic surgeons use advanced techniques designed to tackle the underlying problem while helping patients return to the activities that matter to them.
If shoulder pain is affecting your sleep, work, exercise, or daily activities, an evaluation can help determine the cause and available treatment options.
Schedule an appointment with Vero Orthopaedics.
Frequently Asked Questions
How can I tell if I have a rotator cuff tear or frozen shoulder?
A rotator cuff tear often causes pain and weakness, particularly when lifting or rotating the arm, whereas passive motion (movement done by someone else) tends to stay closer to normal. Frozen shoulder is more strongly associated with progressive stiffness and a significant loss of both active and passive range of motion. Because the symptoms can overlap, an orthopaedic examination is the most reliable way to determine the cause.
Can a rotator cuff tear cause frozen shoulder?
A shoulder injury can contribute to stiffness and loss of motion, particularly if pain causes you to stop using the shoulder. Immobilization after an injury or surgery can also increase the risk of developing frozen shoulder. However, a rotator cuff tear and frozen shoulder are separate conditions and should not be considered the same diagnosis, even though one may sometimes lead to the other.
Can you move a frozen shoulder for someone else?
A person with frozen shoulder typically has restricted passive range of motion. This means that even when a physician or physical therapist carefully moves the arm, the shoulder cannot fully range of motion. This is one of the key findings that help distinguish frozen shoulder from certain rotator cuff injuries, in which passive motion is often better preserved.
Do I need surgery for a rotator cuff tear?
Not necessarily. Many rotator cuff tears can be managed successfully with nonsurgical treatment, including physical therapy, activity modification, medication, or injections. Surgery may be considered when symptoms persist, the tear is significant, weakness is affecting function, or other elements indicate that surgical repair will provide a better outcome.
Do I need surgery for frozen shoulder?
Usually not. Most people with frozen shoulder improve over time with physical therapy and treatments aimed at controlling pain and restoring motion. If significant stiffness continues despite appropriate nonsurgical treatment, an orthopaedic specialist may discuss procedures designed to release the tight shoulder capsule.
How long does a rotator cuff tear take to heal?
Recovery relies on the type and severity of the tear, as well as the treatment used. Smaller injuries may improve over several weeks or months with nonsurgical treatment. Recovery following rotator cuff surgery generally takes considerably longer and includes a structured rehabilitation program, often several months.
How long does frozen shoulder last?
Frozen shoulder can take considerably longer to resolve than many people expect. The condition typically progresses through freezing, frozen, and thawing stages, and full recovery can take anywhere from several months to a few years.
When should I see an orthopaedic specialist for shoulder pain?
Consider an evaluation if shoulder pain persists, interferes with sleep, limits your ability to work or exercise, causes significant weakness, or makes it difficult to perform everyday activities. You should also seek prompt medical evaluation after a significant shoulder injury, particularly if you suddenly cannot lift your arm or notice substantial weakness.
