What is the main cause of type 2 diabetes?

Insulin helps glucose move from the bloodstream into cells for energy. With insulin resistance, muscle, liver, and fat cells respond less effectively, so the pancreas produces more insulin to compensate. Over time, insulin production may not meet the body’s needs and blood glucose rises. Family history, increasing age, obesity, inactivity, previous gestational diabetes, and some medicines can raise risk, but a diagnosis is not a judgement about personal habits. Prediabetes can occur before type 2 diabetes and may have no noticeable symptoms.

Ask a clinician about blood-glucose testing if you have risk factors or symptoms such as increased thirst, frequent urination, blurred vision, or unexplained tiredness. If tests show prediabetes, structured changes to food choices, movement, sleep, and weight where relevant may delay progression. Established diabetes needs an individual plan that may include medicines, glucose monitoring, and checks of the feet, eyes, kidneys, and cardiovascular health. Do not change prescribed treatment without advice.

Arrange prompt medical review for persistent thirst, frequent urination, recurrent infections, slow-healing wounds, or new numbness in the feet. Seek urgent help for vomiting, severe dehydration, confusion, unusual drowsiness, or breathing that becomes deep and difficult. Sudden facial drooping, arm weakness, or speech trouble may indicate a stroke and needs emergency care.

Ask which glucose tests you need, whether you have prediabetes, what your treatment targets are, and when to check for kidney, nerve, eye, or circulation changes.