Patients with kidney stones need to drink more water. First, the most important factor for stone formation is excessive concentration of urine, after excessive concentration, because some of the components will be oversaturated and precipitated to form stones, so drinking more water will also dilute the urine, which can prevent further increase in stone volume or prevent the formation of new stones. Second, drinking more water will increase the volume of urine, and the way of stone discharge mainly depends on the flushing of urine and the peristaltic movement of the ureter itself, which promotes the gradual discharge of stones from the bladder and elimination from the body. If the volume of urine is too low, the force of stone discharge will be weakened, and the stone will not be removed from the body quickly. Third, patients with stones may have chronic urinary tract infections or mucosal bleeding. Drinking more water to increase urinary power can cause bleeding to stop soon or avoid the formation of blood clots in the body, and can also cause urine containing bacteria to be excreted as soon as possible to reduce urinary tract infections and maintain the cleanliness of the urinary tract. Drinking more water and urinating more after the urine flushes the urinary tract can reduce the attachment of bacteria and can prevent urinary tract infections from appearing.