Overall, significant stress, illness and lack of sleep can be predisposing risk factors for developing an outbreak of shingles.

FORBES: Why Chicken Pox Can Be So Dangerous

Mr Targowski told the judges that so-called "Harris lines" on growing bones were not necessarily a symptom of stress, illness or malnutrition.

BBC: Kimberley Hainey appeals conviction for murdering son

The 31-year-old has not played international cricket in almost a year because of a stress-related illness.

BBC: Trescothick reveals England fear