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're controlling your diabetes and blood sugar by diet and exercise or with medications and insulin, you still need to be cautious of the food and drinks that enter your body. Living with type 1 diabetes myself, I know first hand how much one wrong drink choice can affect my blood sugar levels. A type 1 diabetic does not produce insulin themselves so they must inject insulin with each meal. Making sure what you consume including drinks in between meals is important.