A large number of Facebook friends may appear impressive but, the more social circles a person is linked to online the more likely social media will be a source of stress, says a report.
A report from the University of Edinburgh Business School has found that the more groups of people in someone's Facebook friends, the greater potential to cause offense.
In particular, adding employers or parents resulted in the greatest increase in anxiety.
Stress arises when a user presents a version of themself on Facebook that is unacceptable to some of their online ''friends'', such as posts displaying behaviour such as swearing, recklessness, drinking and smoking.
As older people join the site, this has become an increasing problem as their expectations may be very different from those of younger users, the report said.