Biceps tendon problems at the shoulder

The biceps muscle at the front of the upper arm has two tendons at its upper end: a long head and a short head. The short head attaches to a bony prominence at the front of the shoulder blade. The long head is the one that runs through the shoulder joint itself — it travels across the top of the joint and then down a channel at the front of the upper arm bone called the bicipital (biceps) groove.

Inside the shoulder, the long head attaches near the top of the shoulder socket, close to the labrum — the rim of cartilage around the socket. Because part of the long-head tendon sits within the shoulder, a problem with it can contribute to pain at the front of the shoulder, even though the biceps muscle also helps bend the elbow and turn the forearm. The long-head tendon is generally considered a minor contributor to shoulder stability, and this page does not overstate that role.

This page concerns the proximal long-head tendon at the shoulder. It is a different structure from the distal biceps tendon at the elbow, which attaches the lower end of the biceps to the forearm; a distal biceps rupture at the elbow is a separate problem and is not covered here.

Problems of the proximal long-head biceps tendon fall along a spectrum. They may include:

• Tendinitis or tendinopathy — irritation or gradual, wear-related change in the tendon, often related to overuse or aging.
• A partial tear — some of the tendon's fibers are torn, but the tendon remains in continuity.
• Instability or subluxation — the tendon slips, or partly slips, out of the bicipital groove where it normally sits.
• A complete proximal long-head rupture — the tendon tears all the way through at its upper end.
• Associated superior-labral (SLAP) or rotator-cuff problems — because the long-head tendon attaches near the labrum and lies close to the rotator cuff, biceps problems can occur alongside these conditions.

These categories are not always separate. Tendinitis can coexist with a partial tear; instability in the groove can irritate the tendon; and biceps problems frequently occur together with rotator-cuff, labral, or subscapularis (a rotator-cuff muscle at the front of the shoulder) pathology rather than in isolation. Part of the evaluation is sorting out which structures are actually involved.

It is also normal for tendons to change gradually with age. Not every age-related change seen on the tendon is a disease that needs treatment; what matters is whether the tendon is actually causing symptoms, which is judged from the whole picture rather than from one finding alone.

Proximal biceps problems can cause a range of symptoms. They can include:

• Pain at the front of the shoulder
• Pain with lifting, reaching, pulling, or overhead activity
• Tenderness along the bicipital groove at the front of the shoulder
• A clicking or snapping sensation, which can occur if the tendon is unstable in the groove
• Weakness or fatigue of the arm
• Bruising or a change in the contour of the upper arm after a rupture

These symptoms overlap a great deal with other shoulder problems — including rotator-cuff and labral conditions — so front-of-shoulder pain is not, by itself, proof that the biceps tendon is the cause. Not every ache at the front of the shoulder comes from the biceps.

After a complete proximal rupture, the muscle belly can bunch lower in the arm and produce a rounded bulge sometimes called a "Popeye" appearance. This can be a clue, but it does not confirm a rupture on its own, and its absence does not rule one out — the diagnosis is made by examination, not by appearance alone.

Evaluation usually begins with the history of your symptoms and a physical examination. Because biceps problems so often accompany other shoulder conditions, the examination assesses the shoulder as a whole — the rotator cuff, the biceps, and the associated structures — rather than the biceps tendon alone. The examiner may check the front of the shoulder and the biceps groove, and assess whether the tendon feels stable.

X-rays are used to look at the bones, alignment, and any arthritis when that is relevant. Ultrasound or MRI is used selectively — to look at the tendon and nearby structures when the diagnosis is uncertain or when more detail would change the plan. Imaging is not always required, and imaging findings are interpreted together with your symptoms and examination: a change seen on a scan does not necessarily mean it is the cause of your pain. When imaging is done, it may also help assess the subscapularis, the rest of the rotator cuff, the labrum, and whether the biceps tendon is stable in its groove.

Many problems of the proximal biceps tendon can be managed without surgery, at least to begin with. Nonsurgical care is individualized and may include:

• Activity modification — adjusting or temporarily reducing the activities that provoke the pain
• Rehabilitation that addresses shoulder motion, rotator-cuff and scapular (shoulder-blade) strength, and a gradual return to loading
• Medication when appropriate, as advised by your clinician
• In selected situations, an injection may be considered when it is clinically appropriate; whether an injection is used, and of what kind, is an individual decision made with your clinician

The goal of nonsurgical care is to calm the tendon, restore motion and strength, and let you return to activity comfortably. Part of nonsurgical care is following the shoulder over time so that the plan can be adjusted if the picture changes.

When the proximal long-head tendon ruptures completely on its own, it is often less consequential than a distal biceps rupture at the elbow, because the shoulder has other structures that share the tendon's work. As a result, an isolated proximal long-head rupture can sometimes be treated without surgery.

Whether that is appropriate depends on the individual person — the symptoms, how the arm is functioning, any concerns about the appearance of the arm, activity demands, whether other injuries are present, and personal goals. This page does not imply that every proximal rupture requires repair or tenodesis; that is an individualized discussion. Options after a rupture are described further on the treatment page.

For most people, biceps problems are approached first without surgery. A conversation about surgery may come up in situations such as:

• Symptoms that persist despite an appropriate course of nonsurgical care
• A tendon that is symptomatically unstable in its groove
• Selected partial tears that remain symptomatic
• When surgery is already planned for an associated problem — such as a rotator-cuff, subscapularis, or labral repair — and the biceps is addressed at the same time
• Cramping, weakness, or concerns about the arm's appearance after a rupture, when these are meaningful to the individual

None of these situations means surgery is required. Whether an operation is worthwhile, and which operation, depends on the whole picture — the symptoms, what else is going on in the shoulder, activity and appearance considerations, and personal goals. The main surgical options for the biceps tendon, and how they differ, are described on the treatment page.