Shoulder

Biceps Tendinitis / Proximal Biceps Tendon Rupture

Pain in the front of the shoulder originating from the long head of the biceps tendon is a common complaint that often signals broader shoulder pathology. At Maryland Orthopedic Specialists, we take a comprehensive approach — evaluating the biceps tendon in the context of the entire shoulder — to deliver targeted, effective treatment whether your condition is best managed with therapy, injection, or surgery.

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What is biceps tendinitis / proximal biceps tendon rupture?

Tendinitis of the long head of the biceps tendon is one of the most common conditions affecting the shoulder in middle-aged adults and older. It produces anterior shoulder pain, commonly described as a burning. Is the result of thickening and degeneration of the tendon itself.

The biceps muscle has two heads. The short head attaches to the coracoid process of the scapula and is rarely a source of pathology. The long head biceps tendon (LHBT) originates at the superior labrum and supraglenoid tubercle, traverses the glenohumeral joint, and exits through the bicipital groove in the proximal humerus, where it is constrained by the transverse humeral ligament and the subscapularis tendon.

The LHBT is subjected to significant mechanical stress in this groove: it experiences torsional, compressive, and tensile forces with shoulder motion. Pathology falls into three categories:

Biceps tendinitis / tendinopathy: Inflammation or degeneration of the tendon in the bicipital groove
Biceps instability (subluxation/dislocation): Medial displacement of the tendon out of the groove, typically associated with subscapularis tears
Proximal biceps tendon rupture: Complete or partial disruption of the LHBT

Association with Rotator Cuff and SLAP Pathology

Isolated primary LHBT pathology is uncommon. Studies consistently show that biceps tendon disease is found in >90% of cases in association with rotator cuff pathology, SLAP tears, or both. The LHBT may act as a pain generator in the setting of rotator cuff disease and subacromial impingement, or it may be damaged secondarily by adjacent rotator cuff tears (particularly subscapularis tears causing medial instability). Comprehensive shoulder evaluation is therefore essential when biceps pain is identified.

Treatment options

Non-Operative Management

Activity modification, NSAIDs, and physical therapy are the first-line treatment for tendinitis. PT focuses on rotator cuff strengthening, scapular stabilization, and restoration of normal shoulder kinematics that reduce groove friction. A 6–12 week structured program is appropriate for most patients.

Corticosteroid Injection

A peritendinous corticosteroid injection into the bicipital groove (ultrasound-guided for accuracy) provides effective short-to-medium term pain relief and reduces tenosynovial inflammation. Care is taken to inject around — not into — the tendon to minimize the small risk of tendon weakening. Two to three injections per year is the typical maximum.

Surgical Procedure

Biceps Tenodesis

Surgical detachment of the long head of the biceps tendon from its labral origin and reattachment to the proximal humerus, eliminating biceps tendon pain and SLAP-related symptoms while preserving elbow flexion and supination strength.

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Frequently Asked Questions

I felt a pop in my shoulder and now my arm looks different — what happened?

This description is classic for a proximal biceps tendon rupture. The bulging in the mid-arm ("Popeye sign") represents the biceps muscle retracting distally. Most patients retain excellent elbow function and do not require surgery, though younger active patients may benefit from tenodesis.

Will tenodesis prevent the Popeye deformity?

Yes. Tenodesis re-anchors the tendon to the bone, preventing the muscle from retracting distally. The Popeye deformity only occurs with tenotomy or untreated spontaneous rupture.

Is biceps tendinitis caused by my rotator cuff tear?

In many cases, yes. Biceps tendon disease and rotator cuff pathology frequently coexist. Addressing the rotator cuff tear often resolves biceps symptoms — our surgeons evaluate both simultaneously.

Do I need surgery if my proximal biceps tendon has ruptured?

Not necessarily. Most proximal biceps tendon ruptures (at the shoulder) can be treated non-surgically, particularly in older or less physically demanding patients. Non-surgical management includes a period of rest, ice, and physical therapy, and most patients regain excellent shoulder function. A small loss of elbow supination (palm-turning) strength and a cosmetic Popeye deformity may remain. Surgery (tenodesis) is generally recommended for younger, active patients or those whose work or sport requires maximal supination strength — a decision your MOS surgeon will discuss with you individually.

How long is recovery after biceps tenodesis surgery?

After biceps tenodesis, the arm is typically placed in a sling for four to six weeks to protect the reattachment while it heals to bone. Gentle range-of-motion exercises begin early, progressive strengthening starts around six weeks, and most patients return to unrestricted activity at four to six months. Return to heavy overhead or lifting work may take up to six months. Your MOS surgeon will provide a structured rehabilitation protocol and monitor tendon healing throughout recovery.