Common health issues in aging cats include arthritis, kidney disease, dental problems, hyperthyroidism, and cancer. To manage these issues, it is important to ensure regular veterinary check-ups, maintain a healthy diet specially formulated for senior cats, provide proper hydration, keep them at a healthy weight, monitor any changes in behavior or appearance, and administer any prescribed medications or treatments as recommended by your veterinarian. Additionally, providing a comfortable and stress-free environment can help improve the overall well-being of aging cats.