What Is Bicep Tendonitis?
Bicep tendonitis is a condition where the tendon connecting the biceps muscle to the shoulder becomes irritated or inflamed. The biceps has two shoulder tendons — the long head and the short head — but the long head tendon is most commonly affected.
Repeated stress or sudden strain can cause tiny tears in the tendon. Over time, this leads to inflammation, swelling, and pain in the front of the shoulder.
Common Causes
Bicep tendonitis often develops from overuse or improper movement patterns. Common causes include:
- Repetitive overhead activities (swimming, tennis, baseball, weightlifting)
- Sudden increase in exercise intensity
- Poor lifting technique
- Aging and natural wear-and-tear
- Shoulder instability or impingement
- Trauma or repetitive strain injuries
Symptoms to Watch For
Symptoms usually develop gradually and may worsen with activity:
- Pain in the front of the shoulder
- Discomfort during overhead or pulling movements
- Tenderness when touching the area
- Clicking or snapping sensation in the shoulder
- Mild swelling
- Weakness when lifting or rotating the arm
If left untreated, bicep tendonitis can progress to more serious issues like tendon tears or shoulder impingement.
When Should You See a Doctor?
Mild cases often improve with rest, ice, and activity modification. However, seek medical care if you experience:
- Pain lasting more than 7–10 days
- Increasing weakness in the arm
- Sharp pain after an injury, especially with a popping sound
- A visible bulge in the upper arm (“Popeye” deformity)
- Limited arm movement or instability
- Swelling, redness, or warmth around the shoulder
Early treatment can prevent long-term damage and help you return to normal activities faster.
