Liver cysts are fluid-filled sacs that can develop in the liver. They are usually benign, meaning they are not cancerous, and often do not cause any symptoms. Many people may have liver cysts without even knowing it, as they are often discovered incidentally during imaging tests like ultrasounds or CT scans. Most liver cysts do not require treatment unless they cause discomfort or complications. In rare cases, a cyst may become infected or grow large enough to cause pain. Regular monitoring by a healthcare provider can help ensure that any changes are addressed promptly.