Gout is a common, painful form of arthritis. It causes swollen, red, hot and stiff joints. Gout occurs when uric acid builds up in your blood. This happens if your body produces extra acid or does not eliminate enough, or if you eat too many foods with purines, such as liver and dried beans. Pseudogout has similar symptoms and is sometimes confused with gout. However, it is caused by calcium phosphate, not uric acid.

Often, gout first attacks your big toe. It can also attack ankles, heels, knees, wrists, fingers and elbows.