Although it can hurt, diabetic nerve damage can also lessen your ability to feel pain, heat, and cold. Loss of feeling often means you may not feel a foot injury. You could have a tack or stone in your shoe and walk on it all day without knowing. You could get a blister and not feel it. You might not notice a foot injury until the skin breaks down and becomes infected.
Nerve damage can also lead to changes in the shape of your feet and toes. Ask your health care provider about special therapeutic shoes, rather than forcing deformed feet and toes into regular shoes.