Simple Kidney Cyst Symptoms
Simple kidney cysts usually do not cause symptoms. In most cases, a doctor finds them during an ultrasound or computerized tomography (CT) scan done for another reason. However, simple kidney cysts may:
Cause pain in your side, back, or upper abdomen if they enlarge and press on other organs
Become infected, causing fever, chills, or other signs of infection
Impair kidney function (rare)
Simple kidney cysts have been associated with high blood pressure, but it is unclear what the relationship is between the two.