However, larger stones might block the flow of urine or irritate the lining of the urinary tract. Most stones form in the kidney. Some travel to the ureter or bladder. A smaller number are uric acid stones or cystine stones. One out of ten Canadians will have a kidney stone at some point in their life.
Kidney stones occur much more commonly in men than in women.
They tend to affect people in middle age, and occur more frequently hot climates. Normally, urine contains chemicals which prevent crystals from forming. However, some people seem to be more prone to kidney stones than others. Sometimes, stones can also develop if you have a persistent kidney infection. Your doctor will start by giving you a physical examination and asking you questions about past kidney illness, your diet, use of medications, your lifestyle and family background.