Biceps Tendinitis: Symptoms, Causes & Treatment
One common cause of shoulder discomfort is biceps tendinitis — inflammation of the long head of the biceps tendon, which connects your biceps muscle to the bones in your shoulder. Addressing the inflammation early prevents the tendon from thickening, fraying, or eventually tearing.
What Is Biceps Tendinitis?
Biceps tendinitis is an inflammatory condition affecting the tendon of the biceps muscle. When the shoulder is overused, repetitive motion causes micro-tears in the tendon tissue, leading to inflammation and swelling.
The most commonly affected location is the front of the shoulder, where the long head of the biceps tendon passes through a narrow groove in the arm bone (humerus). Because this space is tight, any swelling creates friction during movement. Over time, this friction leads to chronic pain and restricted mobility.
Common Symptoms
Recognising symptoms early helps you get the right treatment before the condition worsens.
- —Pain at the front of the shoulder — A deep, aching pain that often radiates down the upper arm and worsens with overhead lifting.
- —Weakness — The affected arm may feel weak, particularly when bending the elbow or rotating the forearm.
- —Clicking or snapping — A snapping or clicking sensation in the shoulder joint when moving the arm, caused by the swollen tendon sliding in its tight groove.
- —Limited movement — Stiffness and pain restrict overall shoulder mobility, making it difficult to reach behind the back or lift objects.
Causes of Biceps Tendinitis
Tendon inflammation rarely develops overnight. It typically results from a combination of anatomical factors and lifestyle habits.
- —Overuse — Repeating the same shoulder motions at work or during daily activities places continuous stress on the tendon.
- —Sports injuries — Swimmers, tennis players, and baseball pitchers face a higher risk due to repetitive, aggressive overhead arm movements.
- —Ageing — Tendons naturally lose elasticity over time, making the biceps tendon more vulnerable to inflammation and fraying.
- —Shoulder instability — Loose joints and ligaments force the biceps tendon to work harder to stabilise the arm, leading to excessive strain.
- —Rotator cuff problems — Biceps tendinitis frequently occurs alongside rotator cuff tears. When the rotator cuff fails to keep the shoulder centred, the biceps tendon is subjected to damaging friction.
Distal Biceps Tendinitis
While most people associate biceps tendinitis with the shoulder, the condition can also develop near the elbow. Known as distal biceps tendinitis, this involves the tendon that attaches the bottom of the biceps muscle to the forearm bones.
Unlike shoulder biceps tendinitis, which causes pain at the top of the arm, distal involvement produces pain and tenderness in the crease of the elbow. This type is often triggered by sudden, heavy lifting rather than prolonged overhead activity.
How It Is Diagnosed
Accurate diagnosis is the foundation of effective treatment.
- —Physical examination — Your doctor will assess range of motion, strength, and signs of instability, pressing on the front of the shoulder to locate specific tenderness.
- —X-rays — Help rule out other conditions such as bone spurs or arthritis.
- —Ultrasound — Allows the doctor to observe the tendon in motion, identifying thickening or fluid buildup.
- —MRI — Provides detailed images of soft tissues, confirming the extent of inflammation and revealing any accompanying issues such as rotator cuff tears.
Biceps Tendinitis ICD-10 Codes
Medical professionals use the ICD-10 coding system to classify diagnoses. The base code for biceps tendinitis is M75.2. Location-specific codes provide further detail:
- —Right shoulder: M75.21
- —Left shoulder: M75.22
These codes ensure accurate medical records, proper insurance billing, and targeted treatment planning.
Non-Surgical Treatment Options
Most patients recover with conservative, non-surgical treatment.
- —Rest — Avoiding overhead activities and heavy lifting gives the inflamed tendon time to heal.
- —Physical therapy — A physical therapist guides you through stretching and strengthening exercises to restore range of motion and rebuild the supporting shoulder muscles.
- —Anti-inflammatory medications — Over-the-counter pain relievers such as ibuprofen or naproxen reduce swelling and ease daily discomfort.
- —Cortisone injections — If oral medications are insufficient, a steroid injection directly into the tendon sheath can provide significant pain relief.
When Surgery May Be Needed
Surgery is considered when conservative treatment fails to provide adequate relief.
- —Severe tendon damage — A partial tear requiring surgical repair.
- —Chronic pain — That disrupts sleep and daily function for several months despite conservative care.
- —Biceps tenodesis — The damaged section of the tendon is detached and the healthy portion is reattached to the arm bone, permanently eliminating the friction.
Recovery and Prevention
Recovery from biceps tendinitis requires patience and consistency. Mild cases often improve within a few weeks of rest and physical therapy. More severe cases, or those requiring surgery, may take three to six months for full recovery.
Regular exercises that stretch the chest muscles and strengthen the rotator cuff are essential throughout rehabilitation. To prevent recurrence, warm up thoroughly before sport or weightlifting, maintain good posture, and avoid repetitive overhead motions where possible. Rest your shoulder at the first sign of ache or fatigue.
Frequently Asked Questions
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Do not let shoulder pain keep you from the activities you love. Early intervention is the key to a fast and complete recovery from biceps tendinitis.
