hi, thank you for providing the brief history of you grandfather. A thorough clinical musculoskeletal assessment is advised. As he is old and the metabolism will be slow, the vascular insufficiency will have a role to play due to slow cardiac functions. Also, he is having swelling and stiff muscles, he needs to keep the leg elevated above the level of the heart to drain the swelling down, as swelling in lower limbs is not good for the cardiac. Also, reducing the fluid intake and balancing the intake and output will help control the swelling, using the stocking for the same will also act as supportive therapy. Since he is old, to improve the metabolism physical therapy will help improve the cardiorespiratory functions by simple general exercises and the swelling is avoided and the skin and muscles will also become normal. In my clinical practice most geriatrics have similar issues and they respond well to physical therapy. Regards Jay Indravadan Patel