beside the advantages of the Internet Thank for the development of technology. Nowadays, everyone has used the Internet to shorten the distance among people and access news in the world quickly, However, everything always has its positive and negative sides. We will discuss below. Firstly, spending a lot of time on the Internet is harmful to our health. Some people are addicted by social webs such as facebook , skype and zalo. Contacting much with the screen of computer and cellphone has a negative impact on our eyes. It causes weak eyesight. Sitting much makes us fatter ,even get serious diseases such as obese , stroke and heart attack. Secondly, they lose communicating skills. They get confused and shy when meeting people. Finally, We are easily tricked because of trusting sellers in the internet. For example , some online shops show a lot of exported goods with high expense . After transfering money to them and receive what they bought , customers know that they were defrauded.