hi,thanks for using health care magic
some people are more prone due to heriditary,food habits genetic causes..
avoid all foods which have a potencial to form kidney
) and which irritate and acidify urine like carbonated drinks,cocoa drinks,choclates,condiments,onion,raddish,spinach,tomatoes,beans,cabbage,cauliflower alcoholic drinks,grpes,blackberries,strawberries etc
the most important is to take lots of fluids,atleast 3litres per day,,milk and milk products at normal quantities are beneficial...consult nephrologist
for further details,,,get well soon