Q: Does one’s blood pressure go down after eating a large amount of cold ice cream or ice desserts?
A: Studies have shown drinking ice water can produce some changes on an EKG tracing of the heart. I do not know how this correlates with eating cold desserts. In response to cold temperatures, heart rate and blood pressure increase to keep the body warm. Based on this, my guess would be
that if large enough amounts of a frozen concoction are consumed quickly enough, blood pressure would increase. However, I would think this might be painful to accomplish. Most people savor ice cream and cold desserts so they are warmed by the mouth prior to swallowing.
High Blood Pressure Climbs in Winter – WebMD.com