Testing for a frozen shoulder typically involves a physical examination and imaging tests.
The physical examination usually involves range of motion tests. The doctor will assess how far you can move your shoulder and arm in different directions. They may also perform tests to check for pain and tenderness.
Imaging tests are also important in diagnosing a frozen shoulder. These tests can help the doctor to rule out other conditions, such as a rotator cuff tear or an injury to the joint. X-rays, ultrasound, and magnetic resonance imaging (MRI) scans are the most commonly used tests for a frozen shoulder.
In some cases, your doctor may also recommend a special type of X-ray called an arthrogram. This test involves injecting a dye into the shoulder joint to help the doctor see the structures more clearly.
Your doctor may also order blood tests to check for conditions that can cause shoulder pain and stiffness, such as diabetes, thyroid disease, and an inflammatory condition called polymyalgia rheumatica.
If your doctor suspects that a frozen shoulder is causing your symptoms, they may refer you to a physical therapist. A physical therapist can provide exercises and stretches to help improve your shoulder range of motion and reduce pain and stiffness.