High blood glucose from diabetes causes two problems that can hurt your feet:

1. Nerve damage. One problem is damage to nerves in your legs and feet. With damaged nerves, you might not feel pain, heat, or cold in your legs and feet. A sore or cut on your foot may get worse because you do not know it is there. This lack of feeling is caused by nerve damage, also called diabetic neuropathy (ne-ROP-uh-thee). It can lead to a large sore or infection.

2. Poor blood flow. The second problem happens when not enough blood flows to your legs and feet. Poor blood flow makes it hard for a sore or infection to heal. This problem is called peripheral (puh-RIF-uh-rul) vascular disease. Smoking when you have diabetes makes blood flow problems much worse.

These two problems can work together to cause a foot problem.

Duiabetes Can hurt your feet and its effect on skin Taking Care of Diabetic Feet Common Diabetec Foot problems Signs of Foot Problems And steps Of Protecting Your Diabetic Feet Guide to Skin Care Habit For Diabetic Patient

For example, you get a blister from shoes that do not fit. You do not feel the pain from the blister because you have nerve damage in your foot. Next, the blister gets infected. If blood glucose is high, the extra glucose feeds the germs. Germs grow and the infection gets worse. Poor blood flow to your legs and feet can slow down healing. Once in a while a bad infection never heals. The infection might cause gangrene (GANG-green). If a person has gangrene, the skin and tissue around the sore die. The area becomes black and smelly.

To keep gangrene from spreading, a doctor may have to do surgery to cut off a toe, foot, or part of a leg. Cutting off a body part is called an amputation (amp-yoo-TAY-shun).

Effect of Diabetes on skin

Diabetes can hurt your skin in two ways:

1. If your blood glucose is high, your body loses fluid. With less fluid in your body, your skin can get dry. Dry skin can be itchy, causing you to scratch and make it sore. Also, dry skin can crack. Cracks allow germs to enter and cause infection. If your blood glucose is high, it feeds germs and makes infections worse. Skin can get dry on your legs, feet, elbows, and other places on your body.

2. Nerve damage can decrease the amount you sweat. Sweating helps keep your skin soft and moist. Decreased sweating in your feet and legs can cause dry skin.