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Baka you mean for gland hindi plan? 
Well if it is Gland then it's maybe a dysfuntion in your Pancreas, for pancreas is an endocrine gland that produces insulin and glucagon. Insulin is a hormone or are hormones that prevents your blood sugar from getting too low (hypoglycemia) or too high (hyperglycemia) so I think if a diabetic patient don't take daily injections of insulin or any medicine that contains insulin to control his blood sugar level, then there will be something wrong and his blood sugar level will become unstable.
doesn't take* for pala hindi don't sorry