A closer look
Brain freezes are a scam engineered by your confused nervous system, because your brain is physically completely numb. The brain tissue itself has absolutely zero nociceptors to detect pain. When you eat ice cream too fast, you rapidly cool the blood vessels in the roof of your mouth. As they quickly dilate to warm back up, a pain signal is sent through the trigeminal nerve. Your brain wildly misinterprets the location of this signal, tricking you into thinking your actual brain is hurting.
