Left kidney cysts are single or multiple cysts containing fluid or semi-solid debris in the left kidney. Left kidney cysts are a common clinical kidney disease, mainly referring to simple, benign cysts. It may be due to various reasons leading to blockage of renal tubules, local urine retention and subsequent formation of cysts. Simple renal cysts usually do not affect the human body when they are relatively small, such as 1-3cm, and then they only require patients to have regular follow-up and periodic review. If the left kidney cyst is found to be bigger and bigger, such as 5-7cm or even more than 10cm, and the patient has symptoms of lumbago and back pain, timely intervention is needed to prevent the left kidney cyst from compressing the renal parenchyma and the normal renal parenchyma from shrinking, which affects the normal operation of kidney function. For the treatment of left kidney cyst, the common treatment method clinically is to perform surgery, usually through minimally invasive surgical methods, such as renal cyst puncture sclerosis to suck out the cyst fluid, which is a relatively simple and less invasive surgical method, but there will be a certain recurrence rate. In addition, traditional open surgery and laparoscopic surgery can be performed. When suffering from kidney cysts, patients should follow the doctor’s advice and undergo regular review in order to monitor the condition. Also ensure sufficient sleep, avoid straining, moderate exercise and balanced diet in order to promote physical recovery.