Kidney stones can eat spinach, but it is recommended to eat less, such as with tofu and other food, generally recommended to blanch and eat. Kidney stones are stones located inside the kidneys, and about 60-70% of kidney stones are calcium oxalate stones, which are related to daily dietary habits. Spinach contains a large amount of oxalic acid, which is very easy to combine with calcium elements in the body to form calcium oxalate precipitation, which can easily increase the concentration of calcium in the urine, and form a variety of calcium stones, such as calcium oxalate, calcium phosphate and so on. Reducing the consumption of spinach can avoid the recurrence of stones. Tofu is a kind of food rich in high protein, calcium, fat, and spinach together with the same food, not only will consume the calcium elements, but also produce chemical reactions, so that the generation of insoluble precipitates, and the precipitates can not be absorbed by the human body, long time together with the food is easy to induce stones. Kidney stone patients in eating spinach, generally recommended to blanch after eating, reduce the risk of stone occurrence. The pain and discomfort in the lower back and abdomen should be alert to the possibility of kidney stones, and need to go to the hospital in time.