Deterioration of psychological well-being is one of the most negative impacts of social media on Thai teens. Easily accessing to social media to meet and get to know lots of people online. Most of them are the celebrities or affluent persons. This makes ordinary users tempted to compare their lives with the perfect life of those well-heeled persons online. What follows is the feeling of low self-esteem. According to Internet use isolated individuals from their friends and family, and has a negative impact on one’s psychological well-being.Additionally, poor academic scores of Thai teen students are directly related to undue use of social media. With no doubt, while teens are spending a great deal of time on social media platforms, their valuable time that should have been spent on academics is reducing. What follows after that, is their poor grades and less efficient learning in the class. Karpinski (2009) studied one research whose the findings reported that college Facebook users have lower GPAs than students who are not the users of social media site. The other negative impact of overuse social media lies on the lack of interpersonal interaction in the real world. Currently, modern people’s daily life is largely dominated with social media interaction. It is much more convenient for teens to interact with their close peers online than to have face-to-face communication. In this case, the development of real interpersonal communication and language proficiency for communication are truly debilitated. According to Tardanigo (2012), “Gen Y and young workforce would prefer to use instant messaging or other social media than stop by an office and talk with someone”. It is obvious that social media are dominating as well as sabotaging real interpersonal communication, especially among a certain group of Thai youths.