Your last physical was ordinary. The doctor said your blood sugar was a little high, then turned to your knee. You went home with no prescription and no reason to keep thinking about that number.
That's how prediabetes slips past people. You may feel perfectly fine. A blood test can find it; thirst after mowing the lawn can't.
More than 2 in 5 adults in the United States have prediabetes, and 8 in 10 don't know it. At your next visit, get the number and ask what it means for you.
- ✓Prediabetes usually has no symptoms, so testing matters.
- ✓An A1C of 5.7% to 6.4% is in the prediabetes range.
- ✓Small, repeatable changes can lower your risk of type 2 diabetes.
The quiet problem in the blood test
The CDC estimates that 115.2 million US adults have prediabetes. That's more than 2 in 5 adults, and 8 in 10 adults with prediabetes don't know they have it.
Prediabetes means your blood sugar is higher than normal but not high enough for a diabetes diagnosis. It doesn't guarantee that type 2 diabetes is next. Think of it as a signal to check your health while you still have room to adjust your routine.
Blood sugar can rise without a dramatic warning. Fatigue has plenty of ordinary explanations, and a little extra thirst can disappear into a busy afternoon. Routine blood work often finds prediabetes before a person feels sick.
People tend to associate frequent urination, strong thirst, blurred vision, and unexplained weight loss with diabetes. Those aren't dependable clues to prediabetes. Some people with diabetes have no noticeable symptoms, or only mild ones, for years.
The CDC risk test is a starting point, not a diagnosis. It asks about age, sex, a history of gestational diabetes, a close family member with diabetes, high blood pressure, physical activity, and weight category. A score of 5 or higher means increased risk, so talk with your doctor about testing. The questions are meant to identify who should have a closer look, not to tell you that you have prediabetes. A low score doesn't replace a conversation about symptoms, family history, or a result your doctor has already seen.
Who should ask, and what the A1C says
At your next appointment, ask whether a blood sugar test fits your history. Mention a parent, brother, or sister with diabetes, high blood pressure, little regular activity, a history of gestational diabetes, or a weight change that concerns you. The American Diabetes Association recommends screening based on risk factors and age. Your doctor may choose an A1C blood test, a fasting plasma glucose test, or another test. A home meter and a social media quiz can't diagnose prediabetes.
If the result is abnormal, ask what happens next and when to repeat it. Diagnosis often requires confirmation, especially without clear symptoms. Save the report, note the test name, and bring your questions to your doctor. A number on a portal can look alarming without context. The appointment is where you can ask about confirmation and a sensible next step. You don't need to decode the lab report alone.
A1C estimates average blood glucose over roughly the past 2 to 3 months. The American Diabetes Association uses these ranges:
- Below 5.7%: not in the prediabetes range.
- 5.7% to 6.4%: prediabetes range.
- 6.5% or higher: diabetes range, usually requiring confirmation unless there is clear severe hyperglycemia or classic symptoms.
A1C is useful, but it isn't a verdict. Anemia, some blood conditions, pregnancy, kidney treatment, and other situations can affect how well the result reflects blood sugar. Your doctor may repeat it or use a different test before making a diagnosis.
Small changes that lower risk
The CDC says losing weight through healthier eating and becoming more active can cut the risk of type 2 diabetes in half. That doesn't call for a crash diet or punishing exercise plan. Choose changes that survive family meals and dark afternoons.
1. Find your baseline. Take the CDC risk test and bring the result to your appointment.
2. Ask for the right test. Ask whether an A1C or fasting glucose test fits your history.
3. Walk after meals when you can. A short, comfortable walk adds activity. Your doctor can help if you have joint or heart problems.
4. Rethink drinks. Water can replace a sugary drink without rebuilding every meal.
5. Pick one repeatable step. Add a vegetable, take an indoor walk, or serve a smaller dessert portion.
6. Ask about support. Your doctor can tell you whether a CDC-recognized diabetes prevention program is available in your area.
One family meal doesn't decide your health. Eat slowly enough to notice when you're satisfied, choose water, and take a short walk if your body feels up to it. Then return to your usual routine at the next meal. No perfect Monday required. That's a plan a busy person can actually keep.
If you've been putting off the call, you're not alone. But you don't need a perfect diet or a new exercise routine before you ask. You'll get more useful advice when your doctor knows what you're eating, how you're moving and what you're ready to change.
When to call your doctor (or 911)
Make a doctor appointment for frequent urination, unusual thirst, blurred vision, unexplained weight loss, or fatigue that doesn't make sense for you. These symptoms have other possible causes, but they deserve an evaluation.
Next checkup, don't let that blood sugar number slide past while the conversation moves on to your knee. Ask what it means, when to retest, and whether a diabetes prevention program near you makes sense.
Fact-Checked Medical Sources
Last reviewed: November 2026 · Fact-checked & verified
