Generally, grade 1 simple renal cysts are usually not cancerous, but a very small number of patients have the chance of cancer. Grade 1 simple renal cyst is related to the increase of tubular diverticulum, gene mutation, infection and other factors, and most of the patients are asymptomatic and not cancerous. With the progress of the disease, when the size of the cyst gradually increases and compresses the surrounding tissues, it can be manifested as lower back pain, abdominal mass, hematuria and so on. If the patient has recurrent infections, taking nephrotoxic drugs, etc., there is a chance of cancer. For asymptomatic grade 1 simple renal cysts, no special treatment is needed and regular medical checkups are sufficient. It is recommended that people with grade 1 simple renal cysts should actively cooperate with doctors and have regular checkups according to their own conditions. Pay attention to the rationality of daily diet, should be low-salt, low-fat, low-potassium food, drink more water, avoid holding urine.