Usually drinking too much water will not cause kidney cysts. Renal cysts may be due to obstruction caused by the gradual enlargement of renal tubular diverticulum, resulting in the formation of urine in the process, the renal capsule wall secretion of protein fluid retention, in the localization of cysts can be formed. And drinking too much water will usually show the symptom of excessive urination, which usually does not cause obstruction and the appearance of renal cysts, so usually drinking too much water will not cause renal cysts. Even for patients diagnosed with renal cysts, because the renal pelvis and renal calyx are not connected, patients with renal cysts usually do not combine with renal function abnormalities, and drinking too much water to produce more urine will not lead to urine into the cysts, and will not aggravate the condition of renal cysts. When patients with renal cysts are large in size, lumbar pain, hematuria and other conditions can occur when they compress the surrounding tissues. Patients with renal cysts are advised to consult regular hospitals, improve relevant examinations under the guidance of physicians, and carry out targeted treatment.