The 78-year-old actor “required treatment” after being taken to hospital for unknown reasons but is now recovering at home, according to the Mirror.
The TV veteran’s illness comes six years after he was checked over by medical staff on the soap’s Manchester set where he was later sent to A&E for medical tests.
The scare was believed to be nothing serious after he arrived back on set to film hours later.
Express.co.uk has contacted a representative for Malcolm for further comment.
While Malcolm is best known for his role as the soap’s busybody Norris, he first appeared on the cobbles in 1974, playing Mavis Riley’s Spanish boyfriend Carlos.
In 1994, he reappeared as Norris Cole, but gave up the role in 1997 before returning just two years later.
Malcolm’s long-serving efforts on the soap has seen him win multiple awards.
In 2006, he won the Best Onscreen Partnership award alongside Barbara Knox (Rita Sullivan) at the British Soap Awards.
He also won the ‘Funniest Character’ title at the Inside Soap Awards in 2001 and 2002.
Coronation Street continues on Monday on ITV at 7.30pm.