“When should I test my blood sugar?”

Ideally, you want to check fasting blood sugars. That would mean checking in the morning after not eating any meals after midnight.

It depends on your treatment regimen. If you are a type 1 or type 2 on basal and bolus insulin then you should check before each meal and at bedtime. If you are a type 2 on pills once or twice day in the morning and at bedtime.

When to test your blood sugar depends on the reason for doing it. If you do not have diabetes, you don't need to test & your insurance will not pay for it. If you still want to test even if you do not have diabetes the best time is in the morning before you eat. If you have type 2 diabetes, the guidelines say test once a day in the AM 3x/week. I personally believe it should be tested 4x/day for 3-5 days a week & prefer fasting & 2 hours post meal. If you have Type 1 diabetes you should test at least 4x/day every day. I prefer Fasting & 2 hour post meal but on some days you might test pre-meal & bed time to fill all the time slots & establish your pattern. If you do have diabetes & your DR. has not answered this ? I'd find another DR. & see a Diabetes Educator for further instruction.