People’s blood glucose will rise 5-15mmol/L when they are nervous, and the range of blood glucose in human body will fluctuate between 10-20mmol/L when people are nervous, and a certain part of people will also rise around 25mmol/L, and the proportion of some people is smaller. The blood glucose value will rise when people are emotionally stressed, mainly because the cortisol hormone, norepinephrine and epinephrine in human body are stimulated by nervousness, causing excessive secretion of hormones, which have the effect of antagonizing insulin and will cause a transient increase of blood glucose in human body. If the tension disappears, the hormone secretion in human body will be restored, the antagonistic insulin effect in normal human body will disappear, and the blood sugar will gradually return to the normal range, it is normal for human body to have higher blood sugar at the moment of tension, there is no need to worry.