What happens during brain freeze?
During brain freezing, the cold thing touches the roof of your mouth (your palate), the sudden temperature change of the tissue stimulates nerves to cause rapid dilation and swelling of blood vessels. Thus, an attempt to direct blood to the area and warm it back up. You should visit the following http://www.wikihow.com/Stop-Brain-Freeze, or http://www.foodrepublic.com/2011/07/11/what-causes-brain-freeze.
blood vessils contract and blood doesnt get to the brain
Vein expand to let out heat while doing that it compresses the brain
your brain freezes:) jk idk
You get a cramp in your brain
Your head hurts for a few seconds...