Pectoralis Minor Syndrome

What is Pectoralis Minor Syndrome (PMS)?

Pectoralis Minor Syndrome (PMS) is a form of thoracic outlet syndrome (TOS) caused by compression of the brachial plexus nerves and/or blood vessels beneath the pectoralis minor muscle, a small muscle located beneath the chest wall. This compression can result in a range of symptoms, including pain, numbness, tingling, weakness, and swelling in the chest, shoulder, arm, and hand.

What causes PMS?

• Repetitive overhead motions (e.g., athletes, manual laborers)
• Poor posture, especially rounded shoulders
• Muscle hypertrophy or tightness
• Previous trauma to the shoulder or chest
• Prolonged computer or desk work

These factors can lead to shortening or tightening of the pectoralis minor, which in turn compresses the neurovascular structures underneath.

Common symptoms of PMS:

• Dull, aching pain in the chest or under the collarbone
• Tingling or numbness in the arm and hand (especially pinky and ring fingers)
• Heaviness or swelling in the arm, especially with activity
• Shoulder and upper back tightness
• Weakness or clumsiness in the affected arm
• Symptoms that worsen with overhead activity, lifting, or prolonged sitting

Treatment Options:

• Pectoralis Minor Muscle Injection/Block
• Botox Injection into Pectoralis Minor Muscle
• Cryoneurolysis of Medial and Lateral Pectoral Nerves 

If you’re struggling with upper chest or arm pain, tingling, or weakness that hasn’t responded to rest or therapy, you don’t have to live with the pain. Contact us today and let us help you identify the cause and guide you toward long lasting relief.