DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Gout of the big toe joint of a 51-year-old man. Gout is a condition in which crystals of uric acid are deposited inside joints, usually due to high blood levels of uric acid (hyperpuricaemia). This is an extremely painful condition, which leads to swelling of the joint and intense pain on moving or even lightly touching the affected joint. Treatment is with painkilling drugs, and colchicine can also be taken to reduce the severity of an attack.
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