The harm of Internet cafes and night markets is from the perspective of human health.

Computer monitors have high brightness, flicker and great radiation. Staring for a long time can easily lead to temporary myopia. At the same time, due to the reduction of blinking times, visual fatigue, dry eyes, redness and burning sensation are caused, accompanied by eyelid and forehead pain during operation. When using a computer, because people's sitting posture rarely changes, it is easy to cause back muscle fatigue for a long time, and in severe cases, it will cause strain on cervical and lumbar vertebrae. Working on the keyboard repeatedly every day, long-term, intensive and repeated excessive wrist activities will gradually form joint injuries, which is often called "mouse hands". In the process of operating the computer, the attention is highly concentrated, the eyes and fingers move quickly and frequently, the body and mind are overwhelmed, and symptoms such as dizziness, insomnia and dreaminess, neurasthenia and decreased immunity appear. At the same time, facing computer work for a long time will also have a certain impact on people's psychology. Excessive Internet access can easily lead to social isolation, depression, loneliness, pessimism and other psychological barriers, and even induce some psychological diseases. The harm of "computer syndrome" to body and mind is cumulative, and effective prevention should also start from life in order to avoid causing more serious diseases.