1 Interchangeable needle kits are exactly what they sound like--a set of knitting needle tips, and a set of cords of varying length that can attach and detach from the tips to create many different combinations of needle sizes and cord lengths.
Poor circulation (blood flow) can make your foot less able to fight infection and to heal. Diabetes causes blood vessels of the foot and leg to narrow and harden. You can control some of the things that cause poor blood flow. Don't smoke; smoking makes arteries harden faster.
If you are diabetic and have noticed some leg swelling recently, the following could be a few reasons for it. 1  The main reason for leg swelling in diabetes is peripheral edema. 2  Fluids collect in the feet, ankles and leg and this condition can become quite severe if left untreated.