Kidney stones do not belong to renal insufficiency, but are a separate disease called stone disease, which may be caused by prolonged over-concentration of urine, or may be due to metabolic disorders or changes in the pH of the body, resulting in the formation of crystals or stone-like changes in the urine, but kidney stones can lead to renal insufficiency, such as kidney stones stay for a long time leading to fluid in the kidneys. Then the fluid in the kidney will lead to damage to the function of the kidney parenchyma, and over time, it is easy to develop renal insufficiency, but kidney stones do not belong to renal insufficiency. There are many causes of renal insufficiency, such as kidney damage, dehydration, anemia or various types of nephritis, but in the earliest stage of kidney stones without fluid accumulation, they do not cause renal insufficiency. Therefore, they are two different diseases.