My Dad got really angry last night in his work and when he got home he went to the bathroom alot. After an 8 hour fast, I checked his blood glucose with Accu-chek and it was about 120 mg/dl. Online, it said that it is 'impaired fasting glucose'. Is this definitive or could it be transient because of the emotional trauma of last night??
The 120 is slightly elevated but could also be due to meter error. If you don't have a glucose impairment, getting upset should not raise your blood sugar. To get a definitive answer you need to see a doctor and get proper testing done (fasting glucose and an a1c test).