Social media sites make almost two thirds of people feel inadequate about their own life achievements and jealous of others, according to a new survey.
Nearly half say they make them feel ugly or unattractive, according to a poll by charity for the disabled, Scope.
Although the large rise in social media sites does bring positives, with people saying they find the sites amusing or feeling more attached to others as a result, almost a third say that looking at how well-connected everyone else is leaves them feeling lonely.
The survey of 1,500 users found young people are nearly three times as likely to admit to being addicted to social media sites than other users, although two in five say they would be happier if they used them less.
Scope conducted the survey ahead of a fundraising event in which people pledge to give up technology for 48 hours as part of a campaign to get disabled people more access to devices.
The Digital Detox Weekend will highlight the way iPads can help disabled people live independently by controlling areas of their home such as the front door.
Debbie Bines, from Scope, said: “Social media at its best is a great way to stay in touch with friends, have a chuckle and learn new things – as well as being the world’s leading source of amusing cat pictures.
“But when things get out of balance and we start comparing ourselves to others, or feeling irritated, jealous or even ugly, it’s got to be time to take a break.
“We know that loads of people think they spend too much time online, but feel too addicted to cut down.
“So Scope is challenging people to see if they can tear themselves away from their digital addiction for just 48 hours.”
The survey also reveals almost half of respondents are irritated by people posting personal information online about their feelings or emotions.