1. calcium oxalate monohydrate: prevention (objective: reducing the source of urinary oxalic acid) limiting the intake of oxalic acid (in calcium oxalate stones, the excretion of oxalic acid increases by 20%~50%). Foods rich in oxalic acid: no food: rhubarb, mango, spinach, sesame; Food restriction: cocoa (chocolate), tea, nuts, sesame seeds (peanuts, almonds, nuts), etc.

2. Carbonate apatite and some protein components: most of them are infectious stones. Prevention (objective: to prevent urinary tract infection and acidify urine) $ The important prerequisite for preventing the recurrence of stones is to completely remove stones; Avoid catching cold in the kidney area, bladder area and feet; It is best to drink acidic drinks, such as apple juice, which is beneficial to urine acidification; It is not advisable to drink alkaline drinks, such as orange juice and cola, to avoid urine alkalization.