Dr Hilary spoke to ITV Daybreak about broadcaster Andrew Marr, who is recovering in hospital after suffering a stroke.
He said that ruptured arteries, which can often cause a stroke can happen at any time, to anyone from any age.
More top news
The death toll following the collapse of a six-storey building in Nairobi rises to 10 as fears grow for those still trapped in the rubble
Springwatch presenter Chris Packham describes his battle with depression as "great, hopeless vacuum".
A newly promoted police officer caused a sensation with local women on Facebook