The formation of kidney stones has not been completely clarified, and is considered to be related to its own urinary system malformation, obstruction, damage to dietary habits, etc. 1. Excessive oxalic acid accumulation. The large accumulation of oxalic acid in the body is one of the factors that lead to kidney and urinary stones. Such as spinach, beans, grapes, cocoa, tea, oranges, tomatoes, potatoes, plums, bamboo shoots and other things that people commonly love to eat, is exactly the food that contains high oxalic acid. 2, purine metabolism malfunction. Animal offal, seafood, peanuts, beans, spinach, etc., all contain more purine components. When purine enters the body, it is metabolized, and the end product of its metabolism is uric acid. Uric acid can contribute to the precipitation of oxalate in the urine. If too much purine-rich food is consumed at one time, and the metabolism of purine is out of order, oxalate will be deposited in the urine and form urinary stones. 3, too much fat intake. All kinds of animal meat, especially fatty pork, are fatty foods. Eat more fat in the body is bound to increase, fat will reduce the intestinal can be combined with calcium, thus causing an increase in the absorption of oxalate, if once the excretory function failure, such as sweating, drinking less water, less urine, kidney stones are likely to be formed in this case. Therefore, in order to prevent getting stone disease, drink more water on hot days, and drink more water when you eat food with more oil and water, in order to promote smooth urination and dilute the urine components, it reduces the risk of getting stones. 4, sugar increase. Sugar is an important nutrient for the human body, and should often be added in moderation, but too much at once, especially lactose, will also make the formation of stones to create conditions. Experts found that: whether normal people or stone patients, after consuming 100 grams of sucrose, after 2 hours to check their urine, found that the urinary concentration of calcium and oxalic acid are increased, if lactose is taken, it can promote the absorption of calcium, more likely to lead to the accumulation of calcium oxalate in the body and the formation of urinary stones. 5. Excessive protein. Laboratory analysis of the composition of kidney stones revealed that calcium oxalate accounted for 87.5% of the stones. The source of such a large proportion of calcium oxalate is because protein contains glycine and hydroxyproline, the raw materials of oxalic acid, in addition to protein can also promote the absorption of calcium by the intestinal function. If high protein foods are often consumed in excess, they cause a general increase in the composition of calcium, oxalic acid and uric acid in the kidneys and urine. If the excess calcium, oxalic acid and uric acid are not discharged from the body through the kidney function in a timely and effective manner, the conditions for kidney stones and ureteral calculi will be formed. This is the main reason for the increased incidence of kidney stones in economically developed countries in the world today. From the above factors, to prevent the occurrence of kidney stone disease, it is necessary to change the concept of seeking only one kind of nutrition and pursuing too much nutrition. That is to say, in the daily diet of human beings, not because a certain food is delicious and high nutritional value, it is only to eat this food. We must pay attention to the combination of food, all kinds of food in moderation, even if the body is found to lack a certain nutrient needs a certain food to supplement, should not be a large number of food, because the human body’s digestion, absorption function is limited.