Enlarge By Nicholas Kamm, AFP/Getty Images An Italian asthmatic who was dumped and "unfriended" by his girlfriend signed onto Facebook with a different name and saw she had "friended" a number of guys. LONDON (AP)  Beware unhappy asthmatics: Italian doctors warn that Facebook could trigger an attack in some susceptible users. Gennaro D'Amato and colleagues treated 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. "The sight of this seemed to induce (shortness of breath), which happened repeatedly on the patient accessing her profile," wrote D'Amato of the High Specialty Hospital A Cardarelli in Naples, Italy and colleagues. Their letter was published Friday in the medical journal Lancet. The man's worried mother measured his breathing patterns before and after his Facebook activity and found a 20% difference. After consulting a psychiatrist, the man decided not to log into Facebook any more. That stopped the asthma attacks. D'Amato and colleagues say social networks could cause psychological stress and trigger attacks in depressed asthmatics. Doctors, however, should not be advising anxious asthmatics to avoid social networking, said Max Blumberg a psychologist and research fellow at Goldsmiths University in London. "One case study does not make for a good scientific study," he said. "We shouldn't demonize Facebook as the problem." He said that the man might have had the same reaction if he had heard the gossip about his ex-girlfriend's new boyfriends down at the village bar. Blumberg also doubted people would refrain from using the popular networking site to snoop for potentially unsettling information. "How many people are going to be able to resist looking into what our ex-partners are doing?" Copyright 2010 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Guidelines: You share in the USA TODAY community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language decent. Use the "Report Abuse" button to make a difference. You share in the USA TODAY community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language decent. Use the "Report Abuse" button to make a difference. Read more