Can a torn rotator cuff cause pain in the armpit? If you are asking yourself this question, you are likely dealing with a shoulder injury that feels more complex than a simple ache. At Core Physical Therapy in Evansville, we know that shoulder pain is rarely straightforward. While the classic sign of a rotator cuff injury is pain on the side of the upper arm, symptoms can radiate and appear in unexpected places, including the axilla, or armpit.
Understanding the source of your pain is the first step toward recovery. This guide will help you understand why your shoulder injury might be causing discomfort in your underarm and when it is time to seek professional help.
The Connection Between Shoulder Injuries and Armpit Pain
The shoulder is one of the most mobile and complex joints in the body. It relies on a group of four muscles and tendons known as the rotator cuff to keep the ball of your upper arm bone centered in the socket. When one of these tendons tears, it changes how your shoulder moves and functions.
Most people expect a rotator cuff tear to hurt on top of the shoulder or down the side of the arm. However, the body is an interconnected system. When one part is injured, other areas must work harder to compensate. This compensation often leads to pain in surrounding areas, including the armpit.
Here are three primary reasons why a rotator cuff tear might cause pain in the axilla area.
1. Referred Pain
Nerves can sometimes send pain signals to areas away from the actual injury site. This is known as referred pain. The nerves that supply the rotator cuff and the shoulder capsule share pathways with the nerves that serve the armpit and chest. When the shoulder is inflamed or injured, your brain may interpret those distress signals as pain in the armpit.
2. Muscle Compensation and Guarding
When a rotator cuff tendon is torn, the shoulder becomes unstable. To protect the joint, other large muscles surrounding the shoulder often tighten up. The latissimus dorsi (the large back muscle that forms the back wall of the armpit) and the pectoralis major (chest muscle forming the front wall) may become overworked. This muscle guarding can cause cramping, tightness, and sharp pain deep in the armpit.
3. Inflammation of Nearby Structures
A rotator cuff tear often does not happen in isolation. It can be accompanied by inflammation of the biceps tendon or the subacromial bursa. The long head of the biceps tendon runs down the front of the arm near the armpit. If this tendon is inflamed or frayed alongside your rotator cuff injury, you may feel a distinct ache or shooting pain in the front of the shoulder that radiates into the underarm.
Could It Be Something Else?
While the answer to “Can a torn rotator cuff cause pain in the armpit?” is yes, it is important to rule out other causes. The armpit is a sensitive area containing nerves, lymph nodes, and blood vessels. Pain here can sometimes mimic a shoulder injury or exist alongside one.
Cervical Radiculopathy (Pinched Nerve)
Sometimes the problem is not in your shoulder at all. A pinched nerve in your neck, known as cervical radiculopathy, can send shooting pain, numbness, or tingling down through the shoulder blade, into the armpit, and down the arm. If your pain is accompanied by numbness in your fingers or changes when you move your neck, the issue may originate in your spine.
Thoracic Outlet Syndrome
This condition occurs when blood vessels or nerves in the space between your collarbone and your first rib are compressed. This can cause significant pain in the shoulder and neck and numbness in your fingers. It often causes a deep ache in the armpit area.
How We Diagnose Shoulder Pain in Evansville
Because armpit pain can stem from muscles, tendons, or nerves, getting an accurate diagnosis is essential. At Core Physical Therapy, we go beyond basic symptom checking. We use advanced tools to see exactly what is happening beneath the surface.
Our team uses Diagnostic Ultrasound to visualize muscles and tendons in real time. This allows us to see if there is a tear in the rotator cuff, inflammation in the bursa, or issues with the biceps tendon without the immediate need for an expensive MRI. By seeing the injury, we can create a much more targeted recovery plan.
Treatment Options for Rotator Cuff and Armpit Pain
Once we identify the root cause of your pain, we build a personalized treatment plan to help you recover. You do not always need surgery for a rotator cuff tear. Many tears respond exceptionally well to conservative, evidence-based physical therapy.
Manual Therapy and Strengthening
Our licensed physical therapists use hands-on techniques to release tight muscles that may be causing armpit pain, such as the lats or pecs. We then introduce specific strengthening exercises to stabilize the shoulder joint. This helps the remaining healthy rotator cuff tissue compensate for the injury, reducing pain and restoring function.
Laser Therapy
If inflammation is the primary source of your discomfort, we may utilize Laser Therapy. This non-invasive treatment uses light energy to penetrate deep into the tissue. It helps reduce inflammation, decrease pain, and accelerate the cellular healing process in tendons and muscles.
Sports Rehab and Functional Recovery
For those active in sports or physically demanding jobs, our Sports Rehab program focuses on getting you back to peak performance. We analyze your movement patterns to ensure you are not unknowingly stressing your shoulder and causing recurring pain in the armpit or arm.
When to See a Doctor
While muscle aches are common, certain symptoms require immediate medical attention. You should schedule an appointment if:
- You notice a lump or swelling in the armpit.
- You have a fever or red streaks on the skin.
- The pain was caused by a specific trauma, like a fall or car accident.
- You experience sudden chest pain or shortness of breath.
Take the Next Step Toward Relief
Living with shoulder and armpit pain can limit your ability to reach, lift, and enjoy daily life. You do not have to guess what is causing your symptoms.
If you are wondering if your shoulder pain is related to a rotator cuff injury, let our team at Core Physical Therapy help you find the answer. We are dedicated to helping our Evansville neighbors move better and live pain-free.
Request an Appointment today to start your path to recovery.