A study has found that using a smartphone for one hour before bed may increase the risk of insomnia in young adults. However, the relationship between screen time and health risks is not entirely clear, with some reports suggesting links to other issues such as ADHD in preschool-aged children and headaches in children, while others indicate that limited digital detox can have benefits for mental health. The impact of nighttime phone use is also uncertain, with one report suggesting it may not be as harmful as thought.