How often you need to check your blood sugar will depend upon the type of diabetes you have (type 1 or 2), which treatment(s) you use (oral medications, insulin, and/or lifestyle changes), and your treatment goals.
Type 1 diabetes —
For people with type 1 diabetes, frequent testing with glucose meters (SMBG) is the only way to safely and effectively manage blood sugar levels. Most people need to test at least four times per day. If you use an insulin pump, give yourself three or more insulin injections per day. HbA1c is usually done 3 monthly.
Type 2 diabetes —
For people with type 2 diabetes, the recommendations for how often to test blood sugar are based upon individual factors such as type of treatment (oral medications, insulin, and/or lifestyle changes), A1C level, risk of hypoglycaemia (when blood sugar is too low), and treatment goals.
Blood sugar monitoring is useful for people with type 2 diabetes who take insulin or certain medications that can cause hypoglycaemia. It is generally unnecessary in people who manage their diabetes with diet alone or who take medications that do not cause hypoglycaemia. Your doctor will help you determine how frequently to check your blood sugar based on your situation.