Early Signs of Type 2 Diabetes You Shouldn't Ignore
Thirst, tiredness and blurred vision can be early clues. Learn the symptoms, who's at risk and which tests confirm diabetes.
Medically reviewed by Amara Okafor, MDWritten by Priya Nair, MPHUpdated on
Key takeaways
- Type 2 diabetes often develops slowly, and many people have no symptoms at first.
- Common early signs include extra thirst, frequent urination, tiredness, blurred vision and slow-healing cuts.
- A simple blood test (such as HbA1c) can confirm it — get tested if you have symptoms or risk factors.
Type 2 diabetes happens when your body doesn't respond well to insulin and, over time, can't make enough to keep blood sugar in a healthy range. Because blood sugar usually rises gradually, symptoms can be mild or easy to blame on something else.
Catching it early matters: steady treatment lowers the risk of complications affecting the heart, kidneys, eyes, nerves and feet.
Common early signs
- Feeling very thirsty and drinking more than usual
- Urinating more often, including at night
- Tiredness that doesn't improve with rest
- Blurred vision
- Cuts or sores that heal slowly
- Frequent infections, such as urinary tract, skin or thrush (yeast) infections
- Tingling, numbness or pain in the hands or feet
- Increased hunger, sometimes with unexplained weight loss
- Darker, velvety patches of skin in body folds such as the neck or armpits (acanthosis nigricans), a sign of insulin resistance
Why many people don't notice
High blood sugar can build up over years without obvious symptoms. That's why screening is recommended for people at higher risk, even if they feel well.
Who is at higher risk?
- Having overweight or obesity, especially around the waist
- Being 35 or older
- A parent or sibling with type 2 diabetes
- Being physically inactive
- A history of gestational diabetes or prediabetes
- High blood pressure or abnormal cholesterol
- Polycystic ovary syndrome (PCOS)
- Belonging to certain ethnic groups with higher rates of diabetes, including people of South Asian, African, Hispanic/Latino and Indigenous descent
How diabetes is diagnosed
Your doctor can confirm diabetes with one or more blood tests:
- HbA1c: 6.5% (48 mmol/mol) or higher
- Fasting plasma glucose: 126 mg/dL (7.0 mmol/L) or higher
- 2-hour oral glucose tolerance test: 200 mg/dL (11.1 mmol/L) or higher
- Random glucose: 200 mg/dL (11.1 mmol/L) or higher with classic symptoms
Results are usually repeated to confirm the diagnosis. An HbA1c of 5.7–6.4% suggests prediabetes — a valuable window to prevent or delay diabetes.
What happens next
If you're diagnosed, treatment usually starts with changes to eating and activity, often alongside a medicine such as metformin. A dietitian and diabetes education programme can make the first months much easier.
The takeaway
Early type 2 diabetes is often quiet. If you notice extra thirst, frequent urination, tiredness or slow-healing cuts — or you have risk factors — ask your doctor about a blood test. Finding it early gives you the best chance to stay healthy.
How we reviewed this article
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- National Institute of Diabetes and Digestive and Kidney Diseases Symptoms & Causes of Diabetes. NIDDK. https://www.niddk.nih.gov/health-information/diabetes/overview/symptoms-causes
- American Diabetes Association Professional Practice Committee (2024). 2. Diagnosis and Classification of Diabetes: Standards of Care in Diabetes—2024. Diabetes Care. https://diabetesjournals.org/care/issue/47/Supplement_1
- Centers for Disease Control and Prevention Diabetes Symptoms. CDC. https://www.cdc.gov/diabetes/signs-symptoms/
- October 13, 2026Written, medically reviewed and published. Medically reviewed by Amara Okafor, MD.
Medically reviewed by Amara Okafor, MDWritten by Priya Nair, MPHUpdated on
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