When Shoulder Pain Isn’t Just the Joint: A Look at Arterial Causes

By a joint pain and vascular medicine industry contributor.

You’ve tried physical therapy. You’ve had the cortisone shots. Yet the deep, lasting ache of a condition like adhesive capsulitis, or “frozen shoulder,” remains. This is a frustrating and common cycle for people with long-term joint pain. When standard treatments don’t give you lasting relief, the problem might not be in the joint’s movement. The source could be in your blood vessels.

Inflammation is how the body responds to injury. But with long-term conditions, this inflammation can start to feed itself and never go away. Tiny, new blood vessels can grow in the joint, feeding the inflammation and making nerves extra sensitive. Major blood vessel damage from a sudden injury like a dislocation is rare; a case report in Orthopedic Reviews notes it happens in only 1 to 2% of cases. Instead, doctors are now learning how the shoulder artery network can fuel long-term pain that isn’t caused by an injury. This has led to new treatments that target these blood vessels without major surgery.

Quick answer: Long-term shoulder pain can be caused or made worse by new blood vessels that feed inflammation. A procedure called Shoulder Artery Embolization (SAE) can block these problem vessels. This reduces inflammation and pain without open surgery. It’s an option when other treatments haven’t worked.

What’s inside

•       How Can Arteries Cause Chronic Joint Pain?
•       What Should I Look for in a Shoulder Embolization Provider?
•       What Actually Happens During a Shoulder Embolization Procedure?
•       Frequently Asked Questions About Shoulder Arteries and Pain

How Can Arteries Cause Chronic Joint Pain?

Long-term joint pain is often caused by inflammation that won’t go away. This inflammation can trigger the growth of new, sensitive blood vessels. These vessels create a cycle of pain that keeps going on its own.

In a healthy joint, blood flow is normal and organized. But with a condition like frozen shoulder, long-term inflammation can make the body’s healing response go wrong. The body starts to grow a thick web of tiny, new blood vessels, a process called neovascularization. These new vessels are not the same as a healthy shoulder artery. They are weak and leaky, allowing inflammatory cells to flood the area, including the soft tissue that lines the joint.

This new vessel growth is only half the story. At the same time, tiny new nerve fibers grow right alongside these new arteries. These nerves are very sensitive and send pain signals straight to your brain. The more of these new blood vessels you have, the more sensitive nerves there are in the joint. This explains why frozen shoulder pain can feel so deep and constant. It’s also why treatments that only focus on the joint’s movement often don’t work.

This mix of leaky blood vessels and sensitive nerves creates a painful cycle. The inflammation from the new vessels irritates the new nerves. The nerves then signal for even more inflammation, which causes more vessels to grow. This cycle starts to run on its own, long after the original problem is gone. This is why steroid shots may only help for a short time. They reduce inflammation, but they don’t get rid of the blood vessels that keep creating it. To break the cycle, you have to target the source: the problem arteries.

❝ It’s important to know that this procedure doesn’t shut down the main blood supply to your shoulder. It’s very precise. The goal is to block only the tiny, problem vessels that grew because of the inflammation. All of your healthy, main arteries are left alone.

What Should I Look for in a Shoulder Embolization Provider?

When choosing a doctor for this procedure, you need to check three things: their experience with this specific treatment, their training, and the technology they use.

The specialist performing this procedure is an interventional radiologist, or IR. This is a doctor who uses imaging like X-rays to do procedures with very small cuts. This is a special type of medicine that requires extra training after they become a radiologist. A key thing to look for is a doctor who is “board-certified.” According to the American Board of Radiology, this certification shows that a doctor has met high standards for training and knowledge in this area. Not every radiologist can perform these advanced procedures.

Besides training, experience with this exact type of procedure for joint pain is very important. This is a newer way to use a procedure that has been around for a long time. You should feel comfortable asking the doctor direct questions about their experience.

•       How many of these procedures have you done for frozen shoulder or similar long-term shoulder pain?
•       What results do your patients usually get? How do you know if it worked (less pain, more movement)?
•       How often do complications happen with this procedure in your practice?
•       Can you show me on my scans where the problem blood vessels are and explain your plan?

❝ A doctor who is open about their experience and results is a good sign. Be careful if a doctor is vague or mixes up their experience with other, more common procedures. The technique for shoulder pain is different.

Finally, think about where the procedure is done. It should be in a special room with advanced X-ray equipment. This equipment gives the doctor a live, detailed map of your arteries, which is needed to guide the tools safely.

Here is a simple framework for evaluating potential providers:

A thorough evaluation process helps you understand if both the procedure and the provider are the right fit for your situation. It focuses on finding a specialist with a documented track record in this precise application.

What Actually Happens During a Shoulder Embolization Procedure?

The procedure is a careful process. An interventional radiologist uses live imaging to find and treat the problem arteries from inside your body.

First, the doctor needs to get into an artery. This is usually done through an artery in your wrist or groin. The doctor numbs the area and makes a tiny cut. They then insert a small tube called a sheath. Through this tube, a very thin wire and a catheter (another small tube) are guided up to the arteries in your shoulder. You are awake, but you may get medicine to help you relax.

Once the catheter is in place, the most important part begins: mapping the blood vessels. The doctor injects a special dye that shows up on an X-ray. This creates a live map of your arteries. On this map, the doctor looks for a “blush” or cloudy spot. This spot is the cluster of new, problem blood vessels that are causing the pain.

❝ The doctor’s skill is most important during this mapping step. An experienced doctor can tell the difference between the unhealthy “blush” and your normal, healthy blood vessels. The goal is to block only these tiny problem vessels, not the major arteries.

After finding the target vessels, the doctor guides an even smaller tube (a microcatheter) right into them. Through this tiny tube, the doctor slowly injects tiny round particles. These particles are just big enough to block the problem vessels. This stops the blood flow that feeds the inflammation. The doctor will do a few small injections and check the X-ray map each time until the cloudy “blush” is gone.

At the end, one last X-ray map confirms the problem vessels are blocked and the healthy arteries are still open. The tubes are removed, and pressure is put on the small cut to help it close. The entire procedure usually takes one to two hours.

Frequently Asked Questions About Shoulder Arteries and Pain

What is the major artery in the shoulder? The main artery for the shoulder is the axillary artery. It has several important branches that bring blood to the bones, muscles, and other tissues. This procedure does not block these main arteries.

Can a clogged artery cause shoulder pain? Yes, but it’s different from the process described here. A blockage from atherosclerosis (hardened plaque) can reduce blood flow to your arm and shoulder muscles. This can cause pain, especially with activity. The pain from neovascularization, however, is caused by new, abnormal vessels feeding inflammation directly in the joint. A doctor can help determine the specific vascular cause of your pain.

What are the symptoms of a clogged artery in your arm? Symptoms of a major blocked artery in the arm are often sudden and severe. You might feel pain, numbness, or coldness in your arm and hand. The skin may look pale or bluish. This is a medical emergency. The chronic shoulder pain from neovascularization is different. It is a deep, persistent ache inside the joint that gets worse over time.

About the author

This article is by a contributor from California Joint Pain Institute, a medical practice focused on minimally invasive treatments for chronic joint conditions. Its interventional radiologists specialize in procedures like embolization to provide patients with alternatives to traditional surgery.