Urine is produced when your kidneys eliminate waste and fluid from your blood (pee). When you have too much waste and not enough fluid in your blood, waste can pile up in your kidneys and bind together. Kidney stones are clumps of waste that form in the kidneys. In most cases, your kidneys filter waste from your blood and produce urine (pee). Crystals grow in your kidneys when there is too much waste in your blood and your body isn't making enough urine. For more details please contact us! 9811459842.