Bladder stones refer to stones formed in the bladder. They can be divided into primary bladder stones and secondary bladder stones. The former refers to stones formed in the bladder, which are mostly caused by malnutrition and are more common in children. With the continuous development of my country's economy, bladder stones in children are now on a downward trend; the latter refers to bladder stones that originate from the upper urinary tract or are secondary to lower urinary tract obstruction, infection, bladder foreign bodies, or neurogenic bladder. In economically developed areas, bladder stones mainly occur in elderly men, who often suffer from prostatic hyperplasia or urethral stenosis; in poor areas, they are more common in children and less common in women.