By Sam Blanchard Senior Health Reporter For Mailonline
Published: 19:04 BST, 11 June 2019 | Updated: 19:04 BST, 11 June 2019
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A revolting video has revealed the sight of a foot covered in a callus so thick it can be diagnosed as a medical condition.
The minute-long clip shows the person, who's thought to be a man, touching the sole of their right foot.
The skin is thick, yellow, cracked and looks rock-solid when the hand tries to pick at parts of it with a thumbnail.
A skin expert identified the cause of the skin's condition as an illness called hyperkeratosis, in which too many layers of skin, made of keratin, are produced.
The skin on the foot is thick, yellow, cracked and looks rock-solid when the person's hand tries to pick at parts of it with a thumbnail
The video was shared on the US-based Facebook page Medical Sharing and has been viewed more than 13million times.
Nobody speaks in the clip, which starts off as though it will show a satisfying removal of the dead skin or at least some small parts picked off.
But the skin is so tough, resembling cracked earth in a desert, that none of it can be removed and the person just flicks and prods it.
A podiatrist at footcare experts Margaret Dabbs London, Robert Duff, told The Sun: 'It’s a