LONDON (AP) - Could Facebook be hazardous to some people's health?
Italian doctors warn that it could trigger an asthma attack in some susceptible users.
Gennaro D'Amato and colleagues report treating an 18-year-old man whose asthma attacks were apparently sparked by logging into Facebook and seeing how many men his ex-girlfriend had friended.
The man had been taking two inhaled steroid drugs several times a day to control his asthma. But when his girlfriend dumped him - and worse, unfriended him on Facebook - his condition deteriorated.
Using a new nickname, the man re-friended his ex-girlfriend on the social networking site. But the stress of seeing her photo on Facebook linked to so many new male friends was too much, inducing shortness of breath.
The doctors' letter was published Friday in the medical journal Lancet.