Normal renal function, left kidney stone 1.3 cm, without any symptoms, does not belong to a particularly serious situation, generally need treatment. Normal renal function per se, and the left kidney stone did not cause any clinical symptoms, indicating that the stone belongs to a relatively stable state, and does not belong to a serious condition per se. However, in addition to individual cases, such as isolated stones located in the lower calyx, which can be monitored by regular follow-up ultrasound, the vast majority of other stones require active treatment even if they are asymptomatic, such as extracorporeal shock wave lithotripsy or ureteral lithotripsy. Drinking water and exercising will help to expel the stones. Left kidney stone 1.3 cm, if there is obvious back pain and hematuria symptoms, you need to consult a doctor in a timely manner, under the guidance of the clinician standardized treatment, to avoid the deterioration of the condition.