Uric acid crystals are excessive purine content in the body’s endocrine secretion, metabolized in the human body to form uric acid, uric acid and calcium ions in the body combine with each other to reach saturation level to form urate crystals, which are easily deposited at the joints in the low hanging parts of the body under the acidic internal environment conditions of body fluids or when the temperature changes, resulting in redness, swelling, heat and pain in the joints, and even affecting normal life. The reason why uric acid crystals appear is the following four conditions: 1, personal life and diet habits are not coordinated, such as excessive consumption of seafood products, resulting in excessive purine content in the body, excessive pressure on the kidney excretion, resulting in the emergence of uric acid. 2, the emergence of kidney system diseases, glomerular filtration rate continues to reduce, uric acid can not be excreted with the urine, constantly deposited in the body, resulting in uric acid and calcium ions combined with each other, forming The uric acid crystals, the appearance of uric acid crystals, should be promptly to the hospital for treatment. 3, genetic factors, their own synthesis of uric acid more than the body’s excretion capacity 4, obesity, obese people uric acid excretion is blocked