Pseudogout (SOO-doe-gout) is a form of arthritis characterized by sudden, painful swelling in one or more of your joints. These episodes can last for days or weeks. The most commonly affected joint is the knee.
Also called calcium pyrophosphate deposition disease or CPPD, the common term "pseudogout" was coined for the condition's similarity to gout. Crystal deposits within a joint cause both conditions, although the type of crystal differs for each condition.
It isn't clear why crystals form in your joints and cause pseudogout, but the risk increases with age. Treatments can help relieve pain and reduce inflammation.
Pseudogout most commonly affects the knees. Less often, wrists and ankles are involved. In many cases, there are no symptoms. However, during a pseudogout attack, the affected joints are usually:
• Severely painful
Courtesy: Mayo Clinic