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.
Nerve Problems and Foot Discomfort. If you're diagnosed with diabetes, diabetic neuropathy might be the cause of your foot pain. On the other hand, for those who do not have diabetes, nerve compression could be the root of your pain.