Urological stones are a common disease in urology, but in the process of diagnosis and treatment, it is found that many patients have many misconceptions about the disease, and even some low-ranking residents are not aware of it, summarizing some of the main 3 major misconceptions: Misconception 1: stones are fine if they do not hurt. Some stones tend to cause renal colic and severe pain, and patients will seek medical attention promptly. And some stones may not be uncomfortable, often can not attract attention, even if some people found in the physical examination, but also do not take it seriously. In fact, otherwise, stones can cause hydronephrosis, hematuria, urinary tract infections, which have a greater impact on the kidneys, and even irreversible damage, so it is important to actively treat stones without symptoms. Myth 2: Water quality is too hard will cause kidney stones. Hard water means that the water contains high calcium ions, so people usually think that after drinking hard water will make the blood calcium rise, which will lead to the production of stones. In fact, this is not the case. When water with high calcium content enters the intestinal tract, the calcium can combine with oxalic acid, another stone culprit, to form calcium oxalate, which can be eliminated from the body. Therefore, although the patient’s blood calcium may be slightly elevated, the oxalic acid level is reduced and therefore does not increase the risk of developing kidney stones. Myth 3: Stone patients cannot drink milk and eat tofu. By the same token proper consumption of calcium containing foods can reduce the absorption of oxalic acid in the intestine and therefore will not increase the occurrence of kidney stones, but it is more important for stone patients not to drink strong tea and to keep the urine volume above 2000ml throughout the day.