Kidney Cysts That Grow. In most cases simple kidney cysts do not cause symptoms and usually do not require treatment. Most of them are so small they don t cause any symptoms and are known as simple kidney cysts.
They can be tiny or very large. You might have a single cyst on one. Cysts usually grow slowly and have a smooth surface.
However in some cases simple kidney cysts can grow large enough and cause a dull pain in a person s back side or upper abdomen.
Kidney cysts are pouches of fluid that form on the kidneys and are usually harmless. The capsule of the kidney are stretched so that pain occurs in the lower back grow abdomen or even can travels to upper back. You might have a single cyst on one. Yet it s important to stress that simple kidney cysts rarely harm kidneys or impair their ability to function.