A video of Donald Trump boarding Air Force One appears to show a bald patch at the back of his head is going viral, forcing rumour mills into action over his alleged use of wig.

The recent video of the 45th President of the United States boarding Air Force One has thrown this even more into question, as the wind seems to show a huge bald patch at the back of his head.

An unexpected gust of wind blasted his hair upwards, revealing the apparent extent of his hair loss as well as his long-hidden scalp.

He is constantly asked about it in interviews, countless articles and photo essays have been published about it, The Donald himself tweets about it.

But the commander in chief has always maintained that his hair is real, tweeting about it, ‘My hair may not be perfect but it’s mine,’ and even talking about it in a recent interview with Piers Morgan during which he told him: ‘People find it hard to believe it’s my hair, but it is. It’s hanging in, barely, but it’s hanging in.’

Scroll down for the tweet and the video

As reported by Michael Wolff in his recent book, ‘Fire and Fury: Inside the Trump White House’, Trump’s own daughter Ivanka would joke about her father’s hair to her friends.

He wrote of the first daughter: ‘She treated her father with a degree of detachment, even irony, going so far as to make fun of his comb-over to others.

‘She often described the mechanics behind it to friends: an absolutely clean pate — a contained island after scalp-reduction ­surgery — surrounded by a furry circle of hair around the sides and front, from which all ends are drawn up to meet in the center and then swept back and secured by a stiffening spray.’

Also in Fire and Fury, he said Ivanka revealed to her friends Trump’s hair was dyed.

‘The color, she would point out to comical effect,’ he revealed, ‘was from a product called Just for Men — the longer it was left on, the darker it got. Impatience resulted in Trump’s orange-blond hair color.’

WATCH

Here’s what Donald Trump said about his hair five years ago!

As everybody knows, but the haters & losers refuse to acknowledge, I do not wear a “wig.” My hair may not be perfect but it’s mine.

— Donald J. Trump (@realDonaldTrump) April 24, 2013