Dr Hilary Jones dealt out a warning about wearing a mask amid the coronavirus outbreak.
Good Morning Britain's star, 66, addressed viewers concerns about whether they should use the protective gear while out and about during Thursday's installment.
The doctor urged healthy people not to wear masks when they were in supermarkets or out exercising in the UK.
However, the TV specialist said people self-isolating at home or displaying coronavirus symptoms should wear a mask.
He said: "My personal view is that you don't need to wear a mask if you're out in public socially distancing 2 metres from everyone else.
"But if you've got symptoms or you're self isolating at home, wear a mask."
Dr Hilary pointed out the mistake people mistake when they wear masks puts them more at risk of contracting coronavirus.
He said people stop washing their hands and they touch their faces more.
The doctor set out mask wearers should be washing their hands more and he detailed when they should be carrying out the routine.
He said: "People have to wash hands before putting a mask on, before taking it off and after taking it off."
Good Morning Britain's doctor has been giving his advice to the public on television every week day to help people stay safe.
The UK remained in lockdown over the Easter weekend to combat the coronavirus pandemic sweeping the globe.
Previously, Dr Hilary has warned the lockdown could go on for three months.
Good Morning Britain airs weekdays at 6am on ITV.
