For many people living with diabetes, the biggest danger doesn’t start in the heart or kidneys — it begins at their feet. A small blister, cut, or callus might seem harmless, but for diabetics, it can quickly turn into a severe infection that threatens the entire limb.

High blood sugar weakens blood flow and damages nerves, which means injuries often go unnoticed until it’s too late. The result? Wounds that won’t heal, skin that darkens or swells, and pain that appears only when the infection has spread deep.

Here are the most common warning signs doctors say to never ignore:

• Persistent swelling, redness, or warmth in the feet or toes
• Open sores, blisters, or ulcers that don’t heal within days
• A foul odor coming from the foot or wound
• Numbness or tingling (a sign of nerve damage)
• Discoloration — dark or bluish skin patches around wounds
• Thick, ingrown toenails or cracked skin that bleeds easily

These symptoms can escalate fast. What starts as a mild irritation can lead to tissue death (gangrene) or even require amputation if infection spreads.

Experts stress that prevention is the best protection — inspect your feet daily, never walk barefoot, and report any unusual change to a doctor immediately.

Your feet carry you every day. Take care of them — before it’s too late.