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.
Diabetes can mean double trouble for your feet. First, diabetes can reduce blood flow to your feet, depriving your feet of oxygen and nutrients. This makes it more difficult for blisters, sores, and cuts to heal. And second, the diabetic nerve damage called peripheral neuropathy can cause numbness in your feet.