It is caused by having something cold touch the roof of the mouth ( palate ) , and is believed to result from a nerve response causing rapid constriction and swelling of blood vessels or a `` referring '' of pain from the roof of the mouth to the head .
It is caused by having something cold touch the palate of the mouth . It is believed to result from a nerve response or a `` referring '' of pain from the roof of the mouth to the head .