Patrick DenardDirector Oregon Shoulder Fellowship, Oregon Shoulder Institute · Director Oregon Shoulder Fellowship at Oregon Shoulder Institute

What Shoulder Arthritis Is

21 Sept 2026 · 1 min

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1:24

In this segment Patrick Denard explains the clinical presentation of shoulder arthritis. He identifies the chief complaint as pain that intensifies at night, especially when the shoulder is under pressure while lying down, and notes a possible hormonal modulation that makes nocturnal pain worse. He then describes how cartilage degeneration and joint‑space narrowing lead to a loss of shoulder range of motion, a feature that is often mistaken for frozen shoulder. Denard clarifies that frozen‑shoulder‑type stiffness can actually be a manifestation of arthritis itself. Finally, he outlines the characteristic radiographic signs of shoulder arthritis: narrowing of the joint space, formation of bone spurs, and occasional intra‑articular cysts, all of which correlate with the observed functional limitation.

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So first of all, what are the symptoms of shoulder arthritis? The biggest thing that drives people to see me is pain. That is typically pain that stops people from sleeping at night. When you have shoulder arthritis, you typically have pain with deep inside the shoulder joint that becomes worse at sleep because you're sleeping directly on the shoulder and there's more pressure. There's also thought to potentially being some hormonal relationship that impacts shoulder pain at night. That is, it's modulated to uptick at night, which is unfortunate. But that's the biggest symptom that drives people to see me. The second thing that occurs with shoulder arthritis, because you get narrowing of the joint and destruction of the cartilage, which is the padding of the joint, you typically lose range of motion. Now, another cause of range of motion loss can be a frozen shoulder, or somebody just has the capsule layer, which is the closest to the shoulder, affected. So these are often confused. For instance, many people will come to me with arthritis and say, yeah, I had frozen shoulder before. Well, it was probably their shoulder arthritis. Itself. With arthritis, you have x-ray findings that go along with that loss of range of motion, and that is typically manifested or seen as narrowing of the joint space under x-ray and loss of the joint space with bone spurs. Sometimes you can also see cysts within the joint.