Diabetes is a chronic (long-term) condition characterized by elevated blood sugar levels. It can damage nerves in your feet (neuropathy), resulting in weakness, numbness, and pain. The nerve damage may make it hard to feel injuries or sore spots. Diabetes can also change blood flow. This can make it harder for small problems, like a blister, to heal. In fact, small injuries can quickly become serious infections. They can send you to the hospital. Self-care is key. It helps protect your feet and keep them healthy.