Kidney stones in men is a complex process, and it is a multifactorial process not caused by a single factor, the common causes are as follows: 1, excessive concentration of urine, urine is rich in electrolytes and salts, if you drink less water, urine in a concentrated state, these salts and electrolyte components will be over-saturated, will precipitate out to form salt crystals, and then further formation of stone-like changes. 2, urinary tract Chronic infection, after infection can cause bacteria or shedding epithelium, the formation of stone nodules, so that gradually on the basis of the nodules will gradually develop into kidney stones. 3, the body inhibits stone formation substances less, often because of the lack of citrate in the body, resulting in lower urine PH value, easy to form stones. 4, urinary tract if there is obstructive disease, also easy to lead to stones, such as male prostate The bladder is more prone to bladder stones due to hyperplasia. Stenosis of the ureter or congenital stenosis of the ureteropelvic junction is more likely to lead to congenital stones or secondary stones in the kidney.