Sudden, unexplained foot pain may be caused by irritated or damaged nerves.

6. Slow-Healing Cuts

High blood sugar affects blood flow and slows down the healing process.
If small cuts or blisters take a long time to heal, it may be a warning sign.

7. Dry, Cracked Skin

Diabetes can affect sweat glands, causing severely dry, flaky, or cracked skin on the feet.

Poor circulation and fluid retention — both linked to diabetes — can cause swelling in the feet and ankles.

Low circulation or nerve dysfunction due to high blood sugar can trigger cramps, especially at night.

A condition called acanthosis nigricans, often linked to insulin resistance, can cause the skin to darken or thicken.

Yellowish or brittle toenails can indicate fungal infections, which are more common in people with elevated blood sugar.

Reduced blood flow can cause hair loss on the lower legs, feet, and toes — often an early circulation warning.