Left kidney cysts usually do not disappear on their own, but you need to have regular checkups to observe their specific conditions before deciding on the treatment. If the left kidney cyst is not big and there is no discomfort, there is no need to do special treatment, and it is enough to review the ultrasound every six months or so to know the change of the size of the cyst. However, if the cyst is too large, with a diameter of 5cm or more, treatment is needed. This is because larger cysts may compress the parenchyma of the kidneys, and the risk of spontaneous rupture of larger cysts will increase. Its treatment is mainly laparoscopic surgery or ultrasound-guided cyst puncture and aspiration. Patients with left renal cysts should avoid trauma to the abdomen in daily life to avoid rupture of the cyst. There is no special contraindication to diet, just keep a light diet with balanced nutrition.