A post-meal (postprandial) blood sugar of 180 mg/dL is at the upper limit and slightly high, as ideally it should be below 140 mg/dL in normal individuals and generally under 180 mg/dL in people with diabetes. It may indicate early sugar imbalance or poor control if you are diabetic. Try to reduce sugar and refined carbs, eat balanced meals, and exercise regularly. It?s best to monitor your levels and consult a doctor for further evaluation and guidance.