How is urinary calculus caused?

There are many causes of urolithiasis. Generally speaking, it can be divided into three types. First, it has a certain relationship with the anatomical structure of the genitourinary tract, such as the stricture of the ureter joint causing kidney water, which is easy to cause urinary calculi. Second, it has a certain relationship with the composition of urine. Finally, it has a certain relationship with ethnic region, diet structure and drinking water quality. From a regional point of view, the incidence rate in Guangdong is much higher than that in the north.