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Blood suganr 220 is random/fasting or postmeal?
Get checked the blood sugar Fasting and postmeal. Fasting range is 60-80 and Post meal 80-120. Do regual exercise as walking 3 kms, cycling etc. Left sedentary life style if there. Get examination done by diabetologist
Sometimes there may be false reading seen so dont afraid of it, go for re checkup.
Have a Healthful Day..