Cysts are non-cancerous, small, fluid-filled pouches that can affect kidney function. It may take one or more cysts to develop. The disorder is known as polycystic kidney disease in case many cysts develop. Symptoms of kidney cysts include lower back region mild constant pain, upper abdominal pain, and fever. Kidney cyst risk factors and causes include changes in lifestyle and progressive age. Kidney cyst treatment involves either draining the fluid out of the cyst by puncturing it or removing the cyst with the aid of minimally invasive surgery.