Man nearly dies of allergy to cold air: case
US doctors used the 'ice cube test' to confirm the man's anaphylactic reaction to Colorado's chill
A man almost died when he stepped from a hot shower into the cold air of his home in Colorado after having an anaphylactic reaction to the chilly temperature, US doctors report. 
They have described his case to remind other health professionals that severe reactions to cold temperatures are uncommon but are probably also underdiagnosed.