KYM Marsh has been struck by “crippling” nausea and dizziness during Strictly rehearsals - and fears vomiting on the live show.
The former Coronation Street star, 46, who is paired with Graziano Di Prima, suffers from visual vertigo after developing an issue with her inner ear.
It leads to a “sensitive” balance system which can be easily overwhelmed by rapidly changing visual surroundings - such as bright lights or travelling on a moving escalator or motorway.
And sources say the BBC Morning Live host has been repeatedly on the brink of vomiting while practicing the Viennese Waltz, which involves intense spinning.
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