Is there a connection between having a fever and blood pressure rising?

1 answer | Last updated: Mar 05, 2015
A fellow caregiver asked...

Is there a connection between having a fever and blood pressure rising? Can a mild fever 99.8 or so increase your blood pressure by 30 points on both levels? Or can a sudden elevation in Blood pressure by 30 points cause you to have a fever?


Expert Answers

Jennifer Serafin, N.P. is a registered nurse and geriatric nurse practitioner at the Jewish Homes for the Aged in San Francisco.

Usually, a fever will increase your blood pressure somewhat, especially if the fever is high (greater than 101 F).  However, a temperature of 99.8 usually isn't high enough to raise your blood pressure by 30 points.  In fact, we don't consider a temperature less than 100 F to be a "fever".

I would have your health provider monitor your blood pressure closely, as something else may be going on to make you blood pressure elevated.