• Scientists have identified what causes ‘brain freeze’ — a quick and intense headache felt when we consume ice creams or other such chilly treats too quickly.
• “A brain freeze is what happens when cold food touches a bundle of nerves in the back of the palate.

The sphenopalatine ganglion:

• The sphenopalatine ganglion (SPG) is a group of nerves that are sensitive to cold food, and when they’re stimulated, they relay information that stimulates a part of the brain to have a headache.
• The SPG is a very important bundle of nerves, and although it is the source of brain freeze, this group of nerves is also the cause of other types of headaches.
• Responsible for migraine headaches and cluster headaches.

Source:TH