For Patients & General Readers

Type 2 diabetes is a chronic condition where your body doesn't use insulin properly, leading to high blood sugar levels. It often develops over time, particularly in adults, and can increase the risk of serious health problems like heart disease and kidney damage if not managed.

Clinical Overview

Type 2 diabetes mellitus (T2DM) is characterized by progressive pancreatic beta-cell dysfunction and peripheral insulin resistance, resulting in chronic hyperglycemia. It is a multifactorial disease influenced by genetics, lifestyle, and environmental factors, leading to significant microvascular and macrovascular complications.

Clinical Presentation

Often asymptomatic in early stages, detected incidentally via routine screening.
Gradual onset of symptoms related to hyperglycemia.
Associated with obesity, physical inactivity, and other components of metabolic syndrome.
Family history of diabetes is a significant risk factor.
Presentation can include complications such as retinopathy, nephropathy, or neuropathy.

Signs & Symptoms

Symptoms (Patient-Reported)

Increased thirst (polydipsia)
Frequent urination (polyuria)
Increased hunger (polyphagia)
Unexplained weight loss
Fatigue
Blurred vision
Slow-healing sores or frequent infections

Signs (Clinician-Observed)

Obesity (BMI > 25 kg/m²)
Acanthosis nigricans (velvety, dark skin in body folds)
Hypertension
Dyslipidemia

Differential Diagnoses

Condition	Distinguishing Feature
Type 1 Diabetes Mellitus	Autoimmune destruction of beta cells, typically presents with acute onset of symptoms, ketoacidosis, and is often diagnosed in younger individuals. Autoantibodies are usually present.
Gestational Diabetes Mellitus	Occurs during pregnancy and typically resolves after delivery. Diagnosed via oral glucose tolerance test during pregnancy.
Secondary Diabetes Mellitus	Caused by other medical conditions (e.g., pancreatitis, Cushing's syndrome) or medications (e.g., corticosteroids). History and specific etiology are key.
Monogenic Diabetes (e.g., MODY)	Caused by a single gene mutation, often has a strong family history and may present with milder hyperglycemia and different response to treatment compared to T2DM.
LADA (Latent Autoimmune Diabetes in Adults)	Slowly progressive autoimmune destruction of beta cells, shares features of both T1DM and T2DM. Autoantibodies are present, and insulin dependence may develop later.

Red Flags — Seek Immediate Care

Diabetic ketoacidosis (DKA) or Hyperosmolar Hyperglycemic State (HHS) presentation
New onset of severe visual impairment
Signs of acute limb ischemia or foot ulceration
Symptoms suggestive of myocardial infarction or stroke

Key Investigations

Fasting plasma glucose (FPG)
Hemoglobin A1c (HbA1c)
2-hour plasma glucose during an oral glucose tolerance test (OGTT)
Random plasma glucose
Urinalysis for glucose and ketones
Renal function tests (creatinine, eGFR)
Lipid profile
Thyroid function tests (to rule out other endocrine causes)

Management Overview

Management of T2DM is multifaceted, aiming to achieve glycemic control and prevent complications through lifestyle modification (diet, exercise, weight loss) and pharmacotherapy. Pharmacological agents include oral hypoglycemic agents (e.g., metformin, sulfonylureas, DPP-4 inhibitors, SGLT2 inhibitors) and injectable therapies (e.g., GLP-1 receptor agonists, insulin), with treatment selection guided by glycemic targets, comorbidities, and patient preferences.

Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment. TruelyserMD does not replace clinical judgement.