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 a diabetic, your doctor should examine your feet and order additional tests for your blood sugar. Your annual checkup is also the time to discuss any emotional problems you are having. If you feel sad or lack energy, tell your doctor. Your emotional health is just as important as your physical health.