Differences Between Periarthritis of the Shoulder and Rotator Cuff Injury

Jun 29, 2022 Source: Cainiu Health

Dr. Lin Yunfei

Introduction

The primary distinctions between rotator cuff tendinitis and rotator cuff tear lie in their etiologies, clinical symptoms, and treatment approaches. Rotator cuff tendinitis results from chronic soft-tissue injury of the shoulder, whereas rotator cuff tears commonly occur following acute shoulder trauma or repetitive shoulder movements. Both conditions present with shoulder pain and discomfort; however, in rotator cuff tendinitis, the pain is typically more severe at night than during the day.

Patients with adhesive capsulitis (frozen shoulder) experience shoulder pain and restricted range of motion, while those with rotator cuff injury also present with shoulder pain. Many individuals cannot distinguish between the two conditions—what are the key differences between adhesive capsulitis and rotator cuff injury?

Differences Between Adhesive Capsulitis and Rotator Cuff Injury

The primary distinctions between rotator cuff tendinitis and rotator cuff injury lie in their etiologies, clinical manifestations, and treatment approaches. Rotator cuff tendinitis results from chronic soft-tissue overuse or microtrauma in the shoulder region, whereas rotator cuff injury commonly arises from acute trauma or repetitive shoulder movements. Both conditions cause shoulder pain and discomfort; however, in rotator cuff tendinitis, pain is typically more severe at night than during daytime activities. In contrast, pain caused by rotator cuff injury tends to be persistent and relatively constant without marked diurnal variation. Rotator cuff injury often requires active, symptom-directed management, and some patients may require surgical intervention. Adhesive capsulitis, by comparison, rarely necessitates surgery.

Adhesive capsulitis generally refers to shoulder pain, restricted mobility, and stiffness. It is frequently a self-limiting condition that progresses through three distinct phases: the painful (freezing) phase, the stiff (frozen) phase, and the thawing (recovery) phase. Functional recovery typically occurs within 1–2 years. Rotator cuff injury differs markedly from adhesive capsulitis: it does not resolve spontaneously, and torn tendons do not heal on their own. Instead, with continued activity, recurrent tearing may occur, progressively worsening the tear. Over time, central tendon atrophy and degeneration may develop, rendering surgical repair significantly more challenging.

Since both conditions cause shoulder pain, magnetic resonance imaging (MRI) of the shoulder joint is essential for accurate diagnosis. Adhesive capsulitis can usually be managed conservatively with non-surgical rehabilitation, whereas rotator cuff injury often requires surgical repair. We hope this information has been helpful!

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What should I do if a rotator cuff injury hasn't healed after one year?

Rotator cuff injury refers to damage to the muscles and tendons surrounding the shoulder joint, including tears or inflammation of the rotator cuff tendons. If a rotator cuff injury has not healed after one year, measures such as physical therapy, medication, injection therapy, surgical treatment, and rehabilitation exercises may be considered. Patients are advised to seek timely medical attention when experiencing discomfort and to undergo standardized treatment under a doctor's guidance, which can facilitate recovery.

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What medications are used for rotator cuff injuries?

In general, rotator cuff injuries can be treated with medications such as celecoxib capsules, meloxicam tablets, prednisone acetate tablets, chlorzoxazone tablets, and Yunnan Baiyao capsules, as directed by a physician. It is recommended to seek medical evaluation and use medication according to the doctor's advice. During recovery, patients should maintain a light diet and avoid excessive movement of the affected area to prevent delayed healing.