Hi satya thanks for consulting HCM.
levels can rise well above normal for significant periods without producing any permanent effects or symptoms. However, chronic hyperglycemia
at levels more than slightly above normal can produce a very wide variety of serious complications over a period of years, including kidney
damage, neurological damage, cardiovascular damage, damage to the retina
or damage to feet and legs.
In general, the normal range for most people (fasting adults) is about 80 to 110 mg/dl A subject with a consistent range above 126 mg/dl is generally held to have fasting hyperglycemia.
postprandial or after-meal hyperglycemia is defined as a blood sugar usually greater than 180 mg/dL.
As you have mentioned your levels are quite high rather than normal. But you have to see its persistance. So do a repeat sugar test (both FASTING & PP) if it still high then you should start medicine. Consult a Diabetologist
. If range is normal now then morning walk is enough.
Best of luck.