Stones can be eaten with corn. Corn is a coarse grain which does not cause an increased incidence of stones, and again it is not a good treatment for stones. It is a food with a relatively high content of coarse fiber and vitamins and can be eaten without worry. It is recommended for stone patients that they should maintain a comprehensive nutritional balance, emphasizing not to consume too much of a particular nutrient, they should pay attention to limit the excessive intake of sodium and protein, and eat more of various vegetables, fruits, coarse grains and fiber. It is recommended for all stone patients that drinking a lot of water is the most important and simplest kind of preventive measure, and the daily urine volume should be greater than 2000ml.