17-year-old girls often play with their phones. Sometimes, it's not good to play with their phones and read novels all night because excessive use of their phones may have a negative impact on their physical and mental health. Overuse of the phone could lead to blurred vision, eye fatigue, headaches, neck pain, and other problems. According to the World Health Organization, more than 8 million people worldwide suffer from eye fatigue and headaches every year due to prolonged use of mobile phones. Overuse of the phone could also affect sleep. Using a cell phone would stimulate the brain to keep people awake and alert, thus affecting the depth and quality of sleep. Some people might use their phones before going to bed, making it difficult to fall asleep or have poor sleep quality. Overusing the phone to read novels all night could also affect one's physical and mental health. Long-term continuous use of mobile phones may lead to a lack of physical exercise and social interaction, which may have a negative impact on physical and mental health. Therefore, 17-year-old girls should limit the time and way they use their phones and try their best to maintain good living habits and good health.