Do you feel guilty when calling in sick at work? This might be why...

You wake up feeling unwell but there's a big day at work ahead.

What do you do? If the answer is to go in (or log on), you're not alone.

Research suggests , external anywhere between a third to a half of people in the UK work even when sick - something experts call presenteeism.

And your approach to sickness says a lot about you as an individual and where you work.

"The younger generation get the snowflake tag thrown at them, but it's not true," says University of Manchester psychologist Prof Sir Cary Cooper, who is one of the world's leading experts on workplace wellbeing.

Data from the Office for National Statistics , external supports this view.

Workers aged 16 to 24 took an average of 2.4 days off sick last year, compared to 6.2 days for those aged 50 to 64.

Sir Cary, who has advised the UK government on employment policies in this area, says there are several reasons for this.