The evaluation of pseudogout begins with a history and physical examination.

Signs of pseudogout occur most commonly in the knee, wrist or shoulder.

Physical findings in someone with pseudogout include:

• Joint swelling
• Joint tenderness
• Skin redness over the joint
• Joint stiffness:
• Decreased range of motion of the joints

Tests are required to make the diagnosis of pseudogout.

Tests that may be used to evaluate pseudogout include:

• Arthrocentesis
• A needle is used to collect a sample of joint fluid for testing
• Joint fluid analysis:
• Pseudogout causes calcium pyrophosphate crystals to form in the joint fluid
• Bone x-rays
• Complete blood count