Last updated: 2026-06-04
Does Frozen Shoulder Heal on Its Own?
Contrary to the belief that frozen shoulder improves on its own over time, ongoing fibrosis of the joint capsule can lead to loss of motion over several years. Some patients experience persistent pain or functional limitations long after the initial symptoms, making the perception that it is a “self-healing condition” overly optimistic. The formal name for this condition, which makes it difficult to raise the arm and causes pain at night, is adhesive capsulitis (a condition in which the tissues of the sac surrounding the shoulder joint adhere to each other and become stiff). Tailoring treatment to the stage of the condition and the presence of other diseases may aid recovery.
Adhesive capsulitis is more than simple stiffness. Fibroblasts proliferate abnormally within the joint capsule, collagen accumulates excessively, and chronic inflammation develops in the synovium (the membrane lining the inside of the joint). As these three processes occur simultaneously, the joint capsule gradually thickens and loses elasticity.
The normal shoulder joint cavity is known to have a volume of approximately 10–35 mL. As frozen shoulder progresses, this volume decreases considerably, although the extent of the reduction varies depending on the patient’s condition. When an attempt to raise the arm causes the taut joint capsule to stop the movement, both the narrowed space and fibrosis are responsible.
Frozen shoulder frequently occurs in patients with diabetes. Studies have reported a higher incidence of frozen shoulder among people with diabetes than in the general population. Thyroid or autoimmune disease may also increase the risk. This is because abnormalities in blood glucose and hormone metabolism affect collagen metabolism.
Frozen shoulder, therefore, is not solely a problem of the shoulder joint. Because the body’s overall metabolic environment may contribute to fibrosis of the joint capsule, an approach that treats only the shoulder may have limitations.
Three Stages of Progression — Freezing, Frozen, and Thawing Phases
The natural course of frozen shoulder is divided into three stages. Pain and movement limitations differ at each stage, as do the treatment goals.
The freezing phase is the initial stage. Its most prominent feature is nighttime pain. Lying on the affected side may cause you to wake up in pain, and moving the arm in certain directions causes sharp pain. Because movement is not yet clearly limited, it can easily be mistaken for a rotator cuff problem or shoulder impingement syndrome. By this point, inflammation is already actively progressing within the joint capsule.
The frozen phase is the progressive stage. The pain may seem to have eased, but the shoulder becomes stiffer. Both raising the arm yourself and having someone else raise it are significantly restricted. Raising the arm overhead or reaching behind the back becomes nearly impossible, and fibrosis approaches its final stage.
The thawing phase is the recovery stage, during which movement slowly returns. The phrase “it improves over time” mainly refers to this stage, but the overall natural course reportedly averages about 1–3 years and may last longer in some patients. Even during the thawing phase, full recovery may take several months to more than a year, and some patients develop a chronic condition without recovering sufficiently.
A common situation in clinical practice is that some patients stop treatment when their pain decreases during the frozen phase. If they miss the opportunity to restore movement at this point, function may not return sufficiently even after they enter the thawing phase.
Criteria for Differentiating Frozen Shoulder from Shoulder Impingement Syndrome and Rotator Cuff Tears
The reason you have difficulty raising your arm differs depending on the condition. In frozen shoulder, the joint capsule becomes stiff. In shoulder impingement syndrome, repeated contact involving a tendon beneath the acromion causes pain, while damage to the tendon itself leads to muscle weakness in a rotator cuff tear. Although the symptoms of these three conditions may overlap, distinguishing among them is important because they require different treatment approaches.
The key is passive range of motion. With frozen shoulder, both raising the arm on your own and having someone else raise it are limited. Even when a doctor lifts the patient’s arm, it cannot be raised fully in any direction. In contrast, passive range of motion remains relatively preserved in rotator cuff tears and shoulder impingement syndrome. Even if pain prevents the patient from raising the arm independently, the arm can reach a certain angle when moved by a doctor.
A rotator cuff tear causes noticeable weakness in specific directions. A positive Drop arm test (a test of the ability to resist the arm dropping while it is extended out to the side) or Empty can test (raising the arm with the thumb pointing downward) suggests a tear.
Shoulder impingement syndrome causes pain during the Neer test (rotating the arm while it is raised forward) and the Hawkins test (internally rotating the arm with the elbow bent). The limited range of motion is caused by pain, which differs from the restriction caused by a stiff joint capsule.
Ultrasound or MRI is important for distinguishing among these conditions. These tests can identify rotator cuff damage or tendon calcification, and frozen shoulder and a rotator cuff tear may also occur together in the same shoulder. Relying on symptoms alone may lead to the wrong treatment approach.
From Nonsurgical Treatment to Surgical Options — A Step-by-Step Approach to Treatment Selection
Treatment goals differ by stage. At some stages, pain control comes first, while at others, restoring joint movement is the main focus. Comorbidities and functional goals also factor into treatment decisions. The effects of and responses to the treatments below may vary depending on the individual’s condition, disease stage, and comorbidities.
During the painful stage, an intra-articular corticosteroid injection may help control inflammation and nighttime pain. The injection is performed under ultrasound guidance to confirm accurate placement and may also be used as a preliminary treatment to help the patient participate in rehabilitation. The degree and duration of pain relief vary from patient to patient. Anti-inflammatory pain medication may also be used, and because excessive stretching during this stage can aggravate inflammation, exercise intensity should be limited.
During the frozen stage, manual therapy and exercise therapy are used primarily to help restore movement. Even when the two treatments are combined, changes in pain and the degree of improvement in movement may vary among individuals. Hydrodilatation (a procedure that expands the joint capsule by injecting saline and a corticosteroid into the joint cavity) is another option. It works by applying physical pressure to the stiffened joint capsule to help restore movement and is performed under ultrasound or C-arm guidance. The response to the procedure and how long its effects last may vary depending on the patient’s condition.
PRP (autologous platelet-rich plasma) is being discussed as an adjunctive approach. It has not been established as a standard treatment for frozen shoulder, and careful use is necessary because clinical evidence is still accumulating. Exosome-based treatment remains closer to the research stage, and clinical evidence for its use in frozen shoulder is still limited. Its approval status in Korea, intended use, expected benefits, cost, safety, and alternative treatment options should be reviewed together. Careful judgment is particularly important for patients with comorbidities such as diabetes.
If function has not recovered sufficiently after at least six months of structured nonsurgical treatment, arthroscopic capsular release (surgery that uses an arthroscope to cut the stiffened joint capsule) may be considered. Some patients may show a response to nonsurgical treatment, but the clinical course and treatment response may vary among individuals.
In clinical practice, focusing only on symptoms while disregarding the disease stage reduces treatment efficiency. Repeatedly administering corticosteroid injections during the frozen stage or forcing excessive joint exercises during the painful stage goes against this principle.
Does Frozen Shoulder Eventually Resolve? — Prognosis and Management Principles
The statement that “it improves over time” is only partly true. Although some reports have observed improvement, some patients may still have pain or functional limitations long afterward. The perception that frozen shoulder “gets better on its own” often delays timely, active treatment.
The prognosis requires greater caution when diabetes is present. Diabetes not only increases the risk of developing frozen shoulder but also prolongs recovery and raises the risk of recurrence. This is because poorly controlled blood glucose makes it difficult for collagen metabolism to return to normal. Thyroid dysfunction likewise requires management.
Even after function has recovered, it is important to continue exercises that maintain joint mobility. If the shoulder remains unused for a long time, the joint capsule may stiffen again more quickly. Balanced strengthening of the muscles around the shoulder and maintaining flexibility may provide a foundation for preventing recurrence.
Overall health management directly affects the prognosis. If only the shoulder is treated while blood glucose or thyroid management is neglected, the response to treatment may fall short of expectations or recovery may be slower. An approach that manages the entire metabolic environment, rather than focusing solely on pain control, may help improve the long-term prognosis. It is important to bear in mind that outcomes vary according to the stage of the condition, comorbidities, lifestyle habits, and engagement in treatment.
This content is provided for medical information purposes and may not apply equally to every individual. Please consult a specialist for an accurate diagnosis and appropriate treatment.
References
- Millar Neal L, Meakins Adam, Struyf Filip (2022). Frozen shoulder.. Nat Rev Dis Primers. PMID: 36075904
- Lowry Véronique, Lavigne Patrick, Zidarov Diana (2024). A Systematic Review of Clinical Practice Guidelines on the Diagnosis and Management of Various Shoulder Disorders.. Arch Phys Med Rehabil. PMID: 37832814
- Kirker Kaitlin, O'Connell Melanie, Bradley Lisa (2023). Manual therapy and exercise for adhesive capsulitis: a systematic review with meta-analysis.. J Man Manip Ther. PMID: 36861780