What should you know about HbA1c and type 2 diabetes?

HbA1c is a blood test that measures glucose attached to haemoglobin in red blood cells. It reflects average glucose over a period of time, so it complements rather than replaces home readings. Clinicians use the result with your symptoms, medicines, health history, and other checks to decide whether your diabetes plan is working. It can also help identify prediabetes when interpreted with the appropriate clinical context.

A result above your agreed goal may mean that glucose has been higher than intended, but one result does not explain why. Missed doses, illness, stress, changes in activity, food patterns, or medicine side effects can all contribute. Results may be less reliable with conditions that alter red-cell survival, recent bleeding, kidney disease, or some haemoglobin variants. Longer-term high glucose can injure blood vessels and nerves, affecting the eyes, kidneys, feet, heart, and brain.

Review the result with your diabetes team and ask what goal applies to you. Take medicines as prescribed, check glucose as advised, and record readings alongside meals, activity, and symptoms. Choose sustainable food and movement habits that fit your health and routine. Attend foot, kidney, eye, and blood-pressure checks when offered. Never alter insulin or glucose-lowering medicines without advice, particularly if you have episodes of low glucose, vomiting, or reduced food intake.

Get urgent help for severe confusion, collapse, difficulty breathing, persistent vomiting, or inability to keep fluids down. Seek prompt advice for repeated low-glucose symptoms, very high readings, new foot wounds, spreading redness, or sudden weakness or speech trouble. A gradual HbA1c change usually needs a planned review, while acute symptoms should guide same-day action.

What is my personal HbA1c goal, and when should it be checked again? Do my medicines or kidney health affect the result? How should I respond to low readings or illness? Which foot, eye, kidney, and cardiovascular checks are due?