Hi..High
sugar levels can happen if the body is not using insulin properly (insulin resistance) or not making enough insulin. To find the reason, you can do tests like Fasting Insulin, C-peptide, and HOMA-IR. These will help understand how your body is handling insulin. Please consult a diabetologist or do these tests and review the results. Continue diet control and regular walking. Even if
HbA1c is normal, sugar spikes can still occur. For further clarification, feel free to consult me through Practo.