← Back to Conditions
💪
Shoulder

Infraspinatus Tendinitis

Infraspinatus tendinitis is inflammation of the infraspinatus tendon, one of the posterior rotator cuff muscles responsible for external rotation of the arm. It commonly affects overhead athletes and can cause deep posterior shoulder pain that is often mistaken for other conditions.

⏱️
Typical Recovery Time
6–10 weeks with targeted rehab

Symptoms

  • •Deep aching pain in the posterior shoulder
  • •Pain with external rotation (e.g., throwing, serving)
  • •Tenderness over the posterior aspect of the shoulder
  • •Weakness with resisted external rotation
  • •Pain radiating down the arm in some cases

Common Causes

  • •Repetitive external rotation loading (pitching, tennis, volleyball)
  • •Posterior shoulder tightness
  • •Scapular dyskinesis
  • •Overuse without adequate recovery
  • •Direct trauma to the posterior shoulder

Treatment Options

1Activity modification and rotator cuff strengthening
2Posterior shoulder stretching (sleeper stretch)
3Physical therapy addressing posterior chain mechanics
4Ultrasound-guided injection if needed
5Cross-friction massage and dry needling

When to See a Doctor

Seek evaluation if you have notable external rotation weakness, posterior shoulder instability, or pain that worsens over time.

Frequently Asked Questions

What is infraspinatus tendinitis?
Infraspinatus tendinitis is irritation of one of the rotator cuff tendons in the back of the shoulder. This tendon helps rotate the arm outward and stabilize the shoulder. When irritated, it can cause pain and weakness with activity.
What causes infraspinatus tendinitis?
It is often caused by repetitive overhead motion, throwing, lifting, or poor shoulder mechanics. Athletes in baseball, tennis, swimming, and volleyball can be affected. Weakness around the shoulder blade can also increase stress on the tendon.
What are the symptoms?
Symptoms may include pain in the back or side of the shoulder, especially with reaching or throwing. Some people notice weakness with external rotation. Pain can worsen with overhead activity or sleeping on the shoulder.
How is it treated?
Treatment usually includes rest from painful activity, physical therapy, and anti-inflammatory medications. Therapy focuses on rotator cuff strength, shoulder blade control, and mobility. Injections may be considered if symptoms do not improve.
When can I return to activity?
Return depends on pain, strength, and shoulder mechanics. Many athletes improve over several weeks with consistent rehab. Throwing or overhead sports should be resumed gradually.
Help us grow

No providers listed for Infraspinatus Tendinitis yet

Know a great provider? Recommend them and we'll add them to our directory.

Know a great provider for Infraspinatus Tendinitis?
Help other patients find quality care for Infraspinatus Tendinitis.

Find a Sports Medicine Provider

Connect with a doctor, physical therapist, or imaging center near you.

Find a Provider for Infraspinatus Tendinitis