With the development of science, high-tech products have become a part of people's daily life, and people's mobile phones are also changing their living habits. From a certain point of view, as people's communication tools, mobile phones can not only save communication costs, save communication time, but also improve people's work efficiency. However, now more and more parents have bought mobile phones for their children, so they often see that many students' mobile phones are always hands-on. Because the self-control of primary and secondary school students is not strong, leading to them in the mobile Internet and games can not be accepted. If children are occasionally exposed to new things on mobile phones, it can play a positive role in promoting their growth. If children are addicted to the game for a long time, it will definitely affect their academic performance. If children chat through mobile phones and make bad friends by mistake, it will do harm to their own lives and property safety. In addition, when mobile phones become an important communication medium for children, they will reduce the chance of face-to-face communication independently, resulting in more and more children's character becoming withdrawn, cowardly and paranoid. Recently, some experts have shown that texting teenagers are more impulsive than their peers because they are hard to think deeply, eager to seek results in everything. Using the Lenovo input function of mobile phones to send text messages will make children only pursue speed when they do other things, but ignore accuracy, which greatly affects their way of thinking. Now most smart phones are touch-screen. When children operate, they only need to touch the screen with their hands, which may affect the sensitivity and flexibility of their fingers. "To operate a mobile phone, only one or two fingers are needed, and the flexibility of other fingers will be reduced." In addition, long-term contact with those gorgeous pictures, children are used to getting the content from the pictures, and for the words to be learned in the future, there will be avoidance psychology, forming reading obstacles. Medical experts believe that there are many toxic metals in mobile phones, such as arsenic, mercury, nickel and so on. If these toxic metals contact with children's body for a long time, it is easy to cause diseases. When teenagers use mobile phones, the brain absorbs 60% more electromagnetic waves from mobile phones than adults. Using mobile phones can cause memory deterioration, sleep disorders and other health problems. Dr Gerard KEDO of the University of Warwick in the UK has warned that cell phone radiation can damage the normal function of the child's nervous system, causing a series of problems such as memory loss, headache and poor sleep.. Therefore, as parents of teenagers, we should pay attention to the use of mobile phones, reduce the use time of mobile phones, and avoid the excessive dependence of children on mobile phones. We should spend more time with our children and give them real warmth. Communicate with children more and understand their thoughts. Let children touch new things, and gradually replace their mobile world with the same relaxed but active entertainment. Such as sports, tourism, etc., and then gradually transfer to learning. Cell phones are good for teenagers and bad for them
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