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.
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Two other men missing on Scotland's hills this winter have yet to be found.
The decision was made after two Russian athletes failed drugs tests at the PyeongChang Games.
Sunday will be dry and largely sunny, although there will be some patchy cloud, mainly across eastern Scotland and eastern England.