Urolithiasis is a urinary system polyvalent disease, and the more refined food you eat, the higher the incidence of urolithiasis. Although we can not completely eliminate the occurrence of urinary stones, but can control the occurrence of urolithiasis through dietary regulation, especially to pay attention to is not to drink milk before bedtime, but also eat less sweets. It is best not to drink milk before going to bed because the most dangerous factor for stone formation is the concentration of calcium in the urine, which increases suddenly in a short period of time. After drinking milk for 2 to 3 hours, it is the peak of calcium elimination through the kidneys, so when you are in a sleep state, urine concentration, calcium through the kidneys more, so easy to form stones. Why is it not advisable to eat more sweets? Because the main component of sweets is sugar, after taking too much sugar, the concentration of calcium ions in urine, oxalic acid and acidity of urine will increase. The increased acidity of urine can make calcium urate and calcium oxalate precipitate easily, which can lead to stone formation. In addition, the prevention of urinary stones, in addition to the former often said to control the eating of meat and animal offal, eat more food containing dietary fiber, eat more vegetables and fruits, careful to eat spinach, but also can help intake of vitamin B6, vitamin K. Vitamin B6 can reduce the formation of calcium oxalate crystals in the urine, vitamin K can reduce the urinary oxalic acid content, and therefore appropriate to eat some help reduce the incidence of urolithiasis.