As you have had/still have calcium oxalate
stones, your risk of getting more
kidney stones is much increased. Avoid the foods mentioned and browse the web for more information on oxalate rich foods that you should avoid or eat less of. It is also very important to always stay well hydrated. Your urologist may have advised you to drink 2 litres of fluids (4 pints) during the day, more if you are doing exercises that make you sweat or perspiring in hot weather.