1. Do not eat foods rich in oxalate: About 60% of stones are calcium oxalate stones. Therefore, limited intake of oxalic acid-rich foods, including beans, beets, celery, chocolate, grapes, green peppers, parsley, spinach, strawberries and vegetables of the collard family should be avoided. Also avoid alcohol, caffeine, tea, chocolate, dried figs, lamb, drupes, green peppers, black tea, poppy seeds, etc. 2. Eat less salt: If you have calcium stones, you should reduce your salt intake. You should reduce your daily salt intake to 2-3 grams. 3, Do not take too much vitamin D: Excess vitamin D may lead to the accumulation of calcium in various parts of the body. It is best not to exceed the RDA daily intake of 400 IU of vitamin D. 4. Limit the amount of vitamin C: If you are prone to forming calcium oxalate stones, you should limit the amount of vitamin C. More than 3-4 grams a day may increase the production of oxalic acid, thus increasing the chances of stones. Do not consume high potency vitamin c supplements. 5. Do not drink milk before going to bed: This is due to the fact that milk contains more calcium, and most of the kidney stones contain calcium salts. The most dangerous factor for stone formation is the sudden increase of calcium concentration in the urine for a short time. 2 to 3 hours after drinking milk, it is the peak of calcium elimination through the kidneys, so when it is in a sleep state, urine concentration, calcium through the kidneys more, more weight stone formation.