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
A variety of information can be accessed on the Internet, but in many cases, too much information will make people confused, lose self-confidence and lose personal attention
 Psychologists believe that there indeed exist some kind of Internet mania