Pseudogout: symptoms, causes, diagnosis and treatment

Pseudogout, also called calcium pyrophosphate deposition disease or CPPD, occurs when calcium pyrophosphate crystals collect in a joint and trigger inflammation. A flare can begin abruptly, often affecting a knee, wrist, elbow or another large joint. The condition is different from gout, although both involve crystals and can produce an acutely painful joint.

Pseudogout commonly presents with a hot, red, swollen joint and marked tenderness. Joint swelling is also common. Movement may become difficult because inflammation increases pressure inside the joint. Some people have a fever or feel generally unwell during a strong flare, so a new hot swollen joint deserves prompt medical assessment rather than self-diagnosis.

The immediate trigger is calcium pyrophosphate crystal formation and release inside a joint. Age-related changes in cartilage can make crystal deposits more likely. Certain metabolic or inherited conditions may also be associated with CPPD, particularly when symptoms begin earlier than expected. An injury, illness or operation can sometimes precede a flare, but a flare may also occur without an obvious trigger.

A flare often develops over hours and may settle gradually with treatment. Some people experience isolated attacks, while others develop repeated episodes or a longer-lasting arthritis pattern. Between flares, the joint can feel normal or remain stiff. Ongoing inflammation or cartilage changes may limit movement over time, which is why recurrent symptoms should be reviewed.

Risk rises with advancing age and existing cartilage wear. A previous CPPD flare makes further episodes more likely. Family history, some mineral or hormone-related disorders, and conditions affecting iron or calcium handling can also be relevant. A clinician may consider these associations when symptoms occur at an unusually young age or return frequently.

Diagnosis starts with the symptom pattern and examination of the affected joint. A clinician may use imaging to look for cartilage or crystal-related changes. Joint aspiration can remove fluid for analysis; identifying calcium pyrophosphate crystals helps distinguish pseudogout from infection, gout and other causes of acute swelling. Blood tests may be used to check inflammation or associated conditions.

Treatment aims to calm inflammation, ease pain and protect movement. Options may include anti-inflammatory medication when it is suitable for your health history. A cortisone injection can deliver an anti-inflammatory medicine into a selected joint after infection has been considered. Joint aspiration may reduce pressure and provide fluid for testing. The safest choice depends on the joint involved, other illnesses and current medicines.

During a flare, rest the affected joint without keeping it completely still for long periods. Cold packs wrapped in cloth may feel soothing. Once pain settles, gentle range-of-motion work can help prevent guarding and loss of movement. Keep a record of triggers, joints affected and medicines used so recurring attacks can be discussed clearly at follow-up.

Repeated or persistent inflammation may lead to stiffness, reduced function and worsening cartilage damage. A hot swollen joint can also be caused by infection, which needs urgent treatment. Seek prompt care for severe pain with fever, rapidly increasing redness, feeling faint, or inability to use the limb.

There is no single method that prevents every CPPD flare. Managing associated medical conditions, reviewing medicines with a clinician and maintaining joint mobility may help overall joint health. Do not start supplements or stop prescribed treatment based on a suspected crystal problem without professional advice.

An orthopedic clinician or rheumatology specialist can assess recurring flares, unexplained joint swelling or persistent loss of movement. Arrange assessment promptly for a first hot swollen joint, especially when infection is possible. Bring a list of medicines and details about when the attack began.