5 Warning Signs of Pre-Diabetes You Shouldn't Ignore

One of the most common things I hear in my exam room: "I thought I was just tired from the heat." In Orlando in July, that's a reasonable assumption. But when that tiredness comes right after eating — most days, not just occasionally — I start asking different questions.

Pre-diabetes is exactly what it sounds like: your blood sugar is higher than normal, but not yet in the diabetic range. The tricky part is that it often feels like nothing at all. Or it feels like something you can explain away. Florida heat. A stressful week. Getting older. Not sleeping well. That's exactly why it slips past people for years — sometimes a decade.

About 96 million American adults have pre-diabetes right now. One in three. And 80% of them have no idea. In our community here in Central Florida, the numbers are even more important to know. Hispanic adults are nearly twice as likely to develop type 2 diabetes as non-Hispanic white adults. That's not meant to alarm you. It's meant to say: recognizing the early signs matters more, not less, for many of the families we see.

Here are five things I ask my patients to watch for.

**Fatigue after eating — not just fullness, but dragging**

When blood sugar spikes sharply after a meal and then drops, it wipes you out. This happens most with high-carb meals — white rice, bread, juice, sweet drinks. If you eat lunch and twenty minutes later you can barely stay awake, that's not normal digestion. That's worth mentioning the next time you're in.

**Constant thirst and more frequent trips to the bathroom**

Your kidneys work overtime trying to flush excess sugar out of your blood. More sugar means more urination, and that means faster dehydration. Here in Central Florida, dehydration is already a real issue — especially in the summer. But if you're drinking water consistently and still feeling parched, not just hot, pay attention to that pattern over several days. That's different from being thirsty after a workout.

**Blurry vision, especially later in the day**

High blood sugar affects the lens of your eye, which can swell slightly and change how you focus. The effect is temporary and it comes and goes, which is why it's easy to dismiss. Patients often assume they need a stronger glasses prescription. Sometimes they do. But if the blurriness shifts without a clear reason — better in the morning, worse by afternoon — check your blood sugar before you update your prescription.

**Dark, velvety patches of skin near your neck, armpits, or knuckles**

This is called acanthosis nigricans, and a lot of people have never heard of it. It looks like a shadow or a stain — like the skin got darker in the folds or creases of the body. It won't wash off, and it isn't a hygiene issue. It's insulin resistance showing up on the surface of your skin. I see this fairly often in our clinic, and it almost always leads to a blood sugar conversation. If you've noticed this and written it off, please don't.

**Tingling or numbness in your hands or feet**

High blood sugar damages nerves gradually. Early nerve changes can produce tingling, a burning sensation, or that pins-and-needles feeling — most often in the feet. If you're noticing this regularly, things may have been off for a while. That's useful information, not a reason to panic, but it means we should test now rather than wait another year.

**What to do with this information**

None of these signs alone necessarily means pre-diabetes. But two or three together — especially with risk factors like family history of diabetes, excess weight around the midsection, a sitting-all-day job, or a diet heavy in refined carbs and sugary drinks — that's when I want to see you sooner rather than later.

The test is simple: a fasting blood glucose or an A1C, run right here at the clinic, no specialist needed. If your A1C comes back between 5.7% and 6.4%, that's the pre-diabetic range. Not diabetes. And with real, concrete changes, a lot of people bring that number back down completely.

What do those changes actually look like? Start with liquid sugar. Sodas, sweet tea, juice, horchata, flavored coffees — these spike blood sugar faster than almost anything else and provide almost no nutritional value. Cutting them first makes the biggest difference fastest. Add a thirty-minute walk most days. Pair every meal with protein to slow how quickly blood sugar rises. These aren't dramatic interventions. They're doable once you know what you're working with.

**When to come in — and don't wait on this one**

Make an appointment if any of these symptoms are new or getting worse. Come in if a parent or sibling has diabetes. If you're over 45 and haven't had a blood sugar check in the past year, schedule one. If you've been carrying extra weight around the middle and feel chronically low-energy, that combination alone is reason enough.

At Lake Nona Medical Services, Dr. Catherine Arevalo sees patients at both our Narcoossee Road and Lancaster area locations. We take walk-ins and same-day appointments — no months-long wait to find out where you stand. We work with uninsured patients too, because knowing your numbers shouldn't depend on having perfect coverage. If any of this sounds familiar, come in. A short conversation and a blood test is a very straightforward place to start.

For a deeper look at managing blood sugar through diet and lifestyle, our health resource partner VitaGuia (vitaguia.com) covers this in detail.

*This article is for informational purposes only and does not constitute medical advice. Please consult a qualified healthcare provider for diagnosis and treatment.*