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 nerve damage may cause you to no longer feel pain in your feet, and you may not realize you have a wound or injury that needs treatment. Diabetic nerve damage appears to be more common in people with the following conditions: 1  Problems controlling blood sugar levels. 2  High cholesterol. 3  High blood pressure.