Internet addiction results in physical characteristics such as vision decline, biological clock disorder, neurasthenia and so on. It can't maintain normal sleep cycle, insomnia, headache, inattention, dyspepsia, nausea and anorexia, weight loss occur when the Internet is stopped.<br>There will be conduct barriers, which will induce teenagers to play truant, not communicate with others, be grumpy, have offensive and other abnormal behaviors. Some even slip into the abyss of crime<br>
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