65 year old male diabetic since 38 yeras take insulin 2 dose daily 22 morn and same eve. Have concern my underfeet specially toes feel numb daily. Long time problem. Presently heavy phlegm and cough upon sleeping or when exposed to fan or aircon only while lying. Please advise. Sugar levels are 160 fasting. Am weighing 100kg and height 6 feet.

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