Just under a year ago, Buzzfeed did an interview with Hillary Clinton in which she joked that the reason she doesn’t sweat is because she is a robot.

It is a well-documented, improbable piece of Clinton trivia. It’s been been repeated in articles and books, and confirmed by friends and staffers. In the summer months — inside the unique hotbox that is a New Hampshire gymnasium, under the baking sun that afflicts the Iowa State Fair — reporters have seen it with their own eyes. Hillary Clinton literally does not sweat.

This medical condition, the reduction or absence of sweat, is a not uncommon medical condition called hypohidrosis.

Hypohidrosis is diminished sweating in response to appropriate stimuli. While hyperhidrosis is a socially troubling but benign condition, hypohidrosis can lead to hyperthermia, heat exhaustion, heat stroke and potentially death.[1] An extreme case of hypohydrosis in which there is a complete absence of sweating and the skin is dry is termed anhidrosis.

Pretty much the only major risk factor from this skin condition is the increased risk of overheating, which is exactly what happened while standing in the sunlight at the memorial today while wearing a heavy dark suit.

I’ve got another friend with this exact same condition — she just doesn’t sweat — and she has to 1. Avoid direct sunlight for long periods of time 2. Drink lots of ice water on hot days and 3. Stay indoors in the air conditioning as long as possible.

Unless the AC in the White House has a regular habit of going out at the same time as the ice machine, I don’t think Clinton has much to worry about.