The Internet is harmful to us. You can refer to the following example: 1. Being addicted to the Internet may cause vision and hearing damage. Staring at computer screens and mobile phones for a long time will cause eye fatigue and hearing loss. Internet addiction may lead to increased social isolation and loneliness. Overuse of the internet may lead to a decrease in communication and interaction with the real world, leading to increased social isolation and loneliness. 3. Using the Internet incorrectly may cause harm to the body. For example, sitting in front of the computer for a long time may cause problems such as spinal curvature and cervical pain. 4. Inappropriate use of the Internet may also lead to the leakage of personal information. When filling in personal information on the Internet, it may accidentally reveal personal information, which may lead to problems such as identity theft and fraud. Using the internet inappropriately may also affect mental health. For example, excessive use of the Internet could lead to depression and other problems. Therefore, excessive use of the Internet may cause many negative effects on us. We should use the internet appropriately to maintain healthy living habits and a positive attitude.