Chronic Kidney Disease: Chronic kidney disease (CKD) means that your kidneys are not working as well as they once did. Various conditions can cause CKD. Severity can vary but most cases: are mild or moderate, occur in older people, do not cause symptoms, and do not progress to kidney failure. People with any stage of CKD have an increased risk of developing heart disease or stroke. This is why it is important to detect even mild CKD, as treatment may not only slow down th