my father case his age 73 year he have diabet from 30 year as i am remember , yestrday in morning when he sleep his suger blood been low to arround 95 as fast test suger blood , his heart buls arround 58 in mint and 138 / 68 , his status back to normal when we give him some sweet food after fast blood suger test be arround 110 in left hand when still right hand 95 , i am make test again this day to left hand and give me reading 135 and right hand 95 for suger ,, he have insluin 3 time daily each time 30 ml , the last reading before give him insulin so i am not give him insulin in this night , why