Experts in the United Kingdom who study various types of mental catatonia have found that more and more people will experience varying degrees of discomfort after using the Internet  According to a sample survey of 10,000 people who frequently go online, they admit that they feel irritable and annoyed after going online  The number has reached one-third; and 44% of Internet fans under the age of 20 admit to feeling irritable and nervous after surfing the Internet
Although the use of the Internet is free in some countries, the Internet payment system is implemented in our country, which restricts the online time of Internet users
 Psychologists believe that there indeed exist some kind of Internet mania