<unk>  is a kind of arthritis caused by disorder of uric acid metabolism. Uric acid is a matabolic substance of purines and dissolves in the blood and passes through the kidneys into urine. When the body produces more uric acid and/or excrete less uric acid than normal,<unk>  happens. Urate  crystals can deposit in the joint space. This causes pain and swelling in the affected joints. Symptoms of<unk>  may be sudden and usually start at night. Foods rich in purines, hpertension, diabetes, hypercholesterolemia, overweight and alcohol abuse are common risk factors. The goal of treatment is to relieve pain, reduce the risk of<unk>  complications and prevent future attacks. Usual medications include NSAIDs, colchicine,  corticosteroids, xanthine oxidase inhibitors and probenecid. It is very important to maintain a healthy lifestyle to prevent<unk>  attacks.
Gout
Alkaptonuria
Brownout 
Foot rot
Cystinuria
Cystinosis
Glycosuria
Xanthinuria