This is different from permanent vision damage. It's a fluctuation—good days and bad days—that often improves once blood sugar is controlled.
What to notice: Vision that's clearer some days than others. Trouble focusing, especially after meals.
6. Slow-Healing Sores or Frequent Infections
Cuts that linger. Bruises that don't fade. Gum infections that won't quit. Bladder infections that keep returning.
High blood sugar impairs circulation and weakens immune function, making it harder for your body to heal and fight off invaders.
What to notice: Any wound that takes longer than expected to heal. Recurring infections, especially skin, gum, or urinary tract infections.
7. Tingling, Numbness, or Pain in Hands/Feet
This one is serious. Chronically high blood sugar damages nerves—a condition called neuropathy. It often starts in the extremities, particularly the feet.
Some people describe tingling or "pins and needles." Others feel numbness, burning, or shooting pain. Because sensation is reduced, small injuries can go unnoticed and become infected.
What to notice: Any unusual sensations in your hands or feet. Loss of feeling. Burning pain, especially at night.
8. Darkened Skin Patches (Acanthosis Nigricans)
This is a visible sign that often appears before diabetes is diagnosed. Velvety, dark patches develop in skin folds—typically the neck, armpits, or groin.
It's called acanthosis nigricans, and it's a marker of insulin resistance. Your body is producing extra insulin to compensate, and the skin is reacting.
What to notice: Dark, thickened, velvety skin that looks like it needs washing—but doesn't scrub off.
9. Increased Hunger (Especially After Eating)
You just ate. A full meal. And an hour later, you're hungry again.
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