What are the first signs of type 2 diabetes and how is it diagnosed?
Type 2 diabetes often develops gradually, with early signs including increased thirst, frequent urination, unexplained fatigue, and blurred vision. Diagnosis is confirmed through blood tests — primarily fasting plasma glucose, a 75 g oral glucose tolerance test, or an HbA1c measurement. S.L. Raheja Hospital in Mumbai, located at Mahim West, provides structured diabetes assessment and ongoing care through its dedicated diabetes speciality programme.
Tip: Many people with early type 2 diabetes have no symptoms at all. Routine blood sugar screening is the only reliable way to detect it before complications develop.
What are the common symptoms of type 2 diabetes?
Type 2 diabetes can be silent for years. When symptoms do appear, they typically reflect the body's inability to use glucose efficiently. Recognising these signs early allows for timely diagnosis and intervention.
- Increased thirst (polydipsia) — persistent dryness of the mouth even after drinking fluids
- Frequent urination (polyuria) — especially noticeable at night
- Unexplained fatigue — cells are deprived of glucose for energy
- Blurred vision — high blood sugar causes fluid shifts in the eye lens
- Slow-healing wounds or infections — particularly on the feet or skin
- Tingling or numbness in the hands or feet (early peripheral neuropathy)
- Darkened skin patches (acanthosis nigricans) around the neck or armpits — a sign of insulin resistance
- Unexplained weight loss — less common in type 2 than type 1, but can occur
Warning: Numbness, non-healing foot ulcers, or sudden vision changes require prompt medical review. These may indicate that diabetes has already caused nerve or eye damage.
How is type 2 diabetes diagnosed?
Diagnosis relies on standardised blood tests. A single abnormal result is usually repeated on a separate day to confirm the diagnosis, unless symptoms are unambiguous.
| Test | Normal | Pre-diabetes | Diabetes |
|---|---|---|---|
| Fasting Plasma Glucose | <100 mg/dL | 100–125 mg/dL | ≥126 mg/dL |
| 2-Hour Post-Glucose (OGTT) | <140 mg/dL | 140–199 mg/dL | ≥200 mg/dL |
| HbA1c | <5.7% | 5.7–6.4% | ≥6.5% |
| Random Plasma Glucose | — | — | ≥200 mg/dL with symptoms |
The HbA1c test reflects average blood glucose over the preceding 2–3 months and is particularly useful for monitoring ongoing control after diagnosis. It does not require fasting, making it convenient for routine screening.
Can diabetes develop in later life, and who is most at risk?
Yes, type 2 diabetes can develop at any age, including later in life. In India, the condition is increasingly diagnosed in adults over 40, though younger adults and even adolescents are now affected due to changing lifestyle patterns.
Key risk factors include:
- Family history of type 2 diabetes in a first-degree relative
- Overweight or obesity, particularly abdominal (central) obesity
- Physical inactivity or sedentary occupation
- History of gestational diabetes or polycystic ovary syndrome (PCOS)
- Pre-diabetes (impaired fasting glucose or impaired glucose tolerance)
- Hypertension or abnormal cholesterol levels
- Age above 45 years
- Ethnicity — South Asians, including Indians, carry a higher genetic predisposition
Individuals with one or more of these risk factors should discuss routine screening with their doctor, even in the absence of symptoms. The endocrinology team at S.L. Raheja Hospital can assess metabolic risk and guide preventive strategies.
How is newly diagnosed type 2 diabetes managed?
Management of type 2 diabetes is structured around four pillars: lifestyle modification, blood glucose monitoring, medication, and regular complication screening. The approach is individualised based on the patient's HbA1c, comorbidities, and overall health status.
- Lifestyle modification — a calorie-appropriate diet, at least 150 minutes of moderate aerobic activity per week, and weight reduction where indicated. These measures alone can significantly lower blood glucose in newly diagnosed patients.
- Dietary guidance — limiting refined carbohydrates, sugary beverages, processed foods, and saturated fats. Prioritising fibre-rich vegetables, whole grains, legumes, and lean protein.
- Oral medications — metformin is typically the first pharmacological agent prescribed, unless contraindicated. Additional agents are added based on glycaemic response.
- Blood glucose monitoring — self-monitoring at home and periodic HbA1c testing (typically every 3–6 months) to assess control.
- Complication screening — annual eye examination, kidney function tests, foot examination, and cardiovascular risk assessment.
Tip: For most non-pregnant adults with type 2 diabetes, a target HbA1c of below 7% is recommended. Your doctor may set a personalised target based on your age, kidney function, and risk of hypoglycaemia.
Patients with poorly controlled blood sugar or complex metabolic conditions may benefit from a review by the diabetes care team at S.L. Raheja Hospital, which offers structured diabetes management in Mumbai.
What complications can uncontrolled type 2 diabetes cause?
Persistently elevated blood glucose damages blood vessels and nerves throughout the body. Complications develop gradually and are largely preventable with consistent management.
- Diabetic nephropathy — progressive kidney damage that can lead to chronic kidney disease. Early detection through urine albumin testing is essential. Learn more about kidney care at S.L. Raheja Hospital.
- Diabetic retinopathy — damage to the blood vessels of the retina, a leading cause of preventable blindness
- Peripheral neuropathy — numbness, tingling, or pain in the feet and hands
- Cardiovascular disease — increased risk of heart attack, stroke, and peripheral artery disease
- Diabetic foot ulcers — slow-healing wounds that can progress to infection or amputation if untreated
- Non-alcoholic fatty liver disease (NAFLD) — commonly associated with insulin resistance
- Increased infection susceptibility — including urinary tract infections and skin infections
Patients with diabetes who develop gastrointestinal symptoms such as gastroparesis or chronic diarrhoea may require evaluation through the gastroenterology services at S.L. Raheja Hospital.
When should a person with diabetes see a specialist?
Consult a diabetes specialist or endocrinologist promptly if any of the following apply:
- Fasting blood glucose consistently above 126 mg/dL or HbA1c above 6.5% on two separate occasions
- Symptoms of high blood sugar — excessive thirst, frequent urination, or unexplained weight loss — persisting for more than two weeks
- A non-healing wound or foot ulcer lasting more than seven days
- Sudden or progressive vision changes
- Numbness or burning pain in the feet or hands
- Blood glucose that remains poorly controlled despite oral medication
- Newly diagnosed diabetes during pregnancy (gestational diabetes)
- Planning pregnancy with a known diagnosis of type 2 diabetes
S.L. Raheja Hospital in Mahim West, Mumbai, offers specialist diabetes consultations. Use the booking form on this page to schedule an appointment, or write to info@rahejahospital.com for assistance.
Book a Diabetes Consultation at S.L. Raheja Hospital
Use the booking form on this page, or reach out directly at info@rahejahospital.com