The basis of gout development is the increase of blood uric acid, gout most common bone and joint redness, swelling, pain, etc. The diagnosis of gout includes: 1, physical examination found that the body blood uric acid level (plasma uric acid content) > 7mg/dL, and accompanied by pain, basically can determine hyperuricemia, if accompanied by urate crystals deposition, causing the first metatarsophalangeal joint pain, swelling, or even a huge deformation, as if a ping-pong ball, the emergence of gouty crystals, basically can be judged as gout. 2, through the puncture to extract joint fluid The diagnosis is confirmed by finding gout crystals.