 [ Symptoms ] i use the two hour after meal method to check my sugar sunday is reading was 246 monday is was 116 is this swing a sign [ Disease ] i am not sure if the change in blood sugar you experienced is a sign but it might simply be a result of what you ate did you eat the same amount of carbohydrates at both meals if you had more carbohydrates on sunday that would explain the higher levels recommended blood glucose levels 2 hours after eating is less than 140 mgdl for people 50 or younger less than 150 mgdl for people ages 50 60 and less than 160 mgdl for people over 60 for more on measuring blood glucose levels with diabetes see this webmd article