Biceps Tendinitis

What the biceps tendon does

The biceps muscle has two tendons at the top. The long head runs from the top of the shoulder socket, through the joint, and down a groove at the front of the upper arm bone (the bicipital groove). The short head attaches to the coracoid process of the shoulder blade. The long head is the one that becomes irritated in biceps tendinitis.

The tendon helps bend the elbow, turn the forearm palm-up and stabilize the shoulder. Repeated friction in the groove, especially with overhead movements, can lead to inflammation and, over time, degeneration (tendinosis), fraying or tearing.

Causes and risk factors

• Repetitive overhead activity: throwing, swimming, tennis, volleyball, weightlifting, painting and overhead work
• Rotator cuff disease and shoulder impingement: biceps tendinitis rarely occurs alone in adults over 40
• Aging: tendons lose elasticity and blood supply
• Instability: a loose subscapularis tendon or a labral tear (SLAP tear) lets the tendon slip from its groove
• Sudden increase in training load
• Smoking and diabetes, which slow tendon healing

Symptoms

• aching or sharp pain at the front of the shoulder, sometimes spreading down the front of the upper arm
• pain worse with overhead activity, lifting, pulling or carrying
• tenderness when pressing over the bicipital groove
• pain at night, especially lying on the affected side
• an occasional snapping sound or feeling in the shoulder (tendon subluxation)
• weakness from pain

Diagnosis

A doctor will ask about activities, onset and other shoulder symptoms, then examine the shoulder:

• Tenderness over the bicipital groove, which moves as the arm is rotated
• Speed's test: pain when resisting forward elevation of the straight arm with the palm up
• Yergason's test: pain when resisting turning the forearm palm-up with the elbow bent
• tests for rotator cuff injury, impingement and labral tears

Imaging:

• Ultrasound shows fluid around the tendon, thickening, dislocation or tears, and allows guided injection.
• MRI or MR arthrogram looks for associated rotator cuff and labral injuries.
• X-rays rule out arthritis and bone spurs.

Treatment

Initial care

• Relative rest: avoid overhead activity, heavy lifting and the motion that triggers pain, while keeping the shoulder moving gently.
• Ice: 15 to 20 minutes, several times a day.
• NSAIDs such as ibuprofen or naproxen, following the label, unless you have contraindications.

Physical therapy

Physical therapy is the core treatment. It typically includes:

• range-of-motion exercises: pendulum swings, wall slides
• rotator cuff and shoulder blade strengthening: external rotation with a band, rows, scapular squeezes
• gradual loading of the biceps tendon: isometric holds, then slow curls
• posture correction and technique changes for sport or work

Most people improve within 6 to 12 weeks.

Injection

A corticosteroid injection into the tendon sheath, often guided by ultrasound, can reduce pain when rehabilitation is not enough. Injections are used sparingly because repeated steroid exposure can weaken tendons.

Surgery

Surgery is considered if pain persists after 3 to 6 months of good conservative care, or with significant associated injuries:

• Biceps tenodesis: the tendon is detached from the socket and reattached lower on the arm bone. Preferred in younger, active people.
• Biceps tenotomy: the tendon is simply released from the socket. Quick recovery; a visible bulge in the arm can result.
• Associated rotator cuff, labral or impingement problems are treated at the same time.

Complications

• Tendon rupture: a degenerated tendon can tear, causing sudden pain, bruising and a bulge in the upper arm. In older adults this often relieves the original pain and causes only minor loss of strength, so many are not repaired.
• Chronic shoulder pain and stiffness if associated problems are not addressed.

Prevention

• Warm up before sport and build training loads gradually.
• Strengthen the rotator cuff and shoulder blade muscles.
• Use good technique for throwing, swimming and lifting.
• Take breaks from repetitive overhead work.

Frequently asked questions

What does biceps tendinitis feel like?

It feels like an aching or sharp pain at the front of the shoulder, sometimes spreading down the upper arm. It worsens with lifting, reaching overhead or pulling, and the front of the shoulder is tender to press. Some people feel snapping.

How long does biceps tendinitis take to heal?

Most cases improve within 6 to 12 weeks of rest, ice, pain relief and physical therapy. Long-standing tendinopathy or cases linked to rotator cuff disease can take several months. Surgery is considered only if symptoms persist after 3 to 6 months.

What exercises help biceps tendinitis?

Physical therapists use pendulum swings, wall slides, rotator cuff strengthening with a resistance band, shoulder blade exercises like rows, and gradual biceps loading. Start gently, avoid sharp pain, and progress slowly. A therapist can tailor the program.

Can biceps tendinitis lead to a torn tendon?

It can. Long-standing degeneration weakens the tendon, and it may tear, sometimes with a pop and a bulge in the upper arm. Older adults with this type of tear often recover good function without surgery.