What effect can excessive screen time have on sleep?

Excessive screen time can disrupt sleep onset for a number of reasons. The blue light emitted by screens interferes with the production of melatonin, the hormone responsible for regulating sleep-wake cycles. This disruption can make it more difficult for individuals to feel sleepy at their usual bedtime. Additionally, engaging with stimulating content, whether through social media, video games, or even intense news articles, can increase mental engagement and alertness, further hindering the ability to relax and transition into sleep.

The habit of using screens right before bed can condition the brain to associate these activities with late-night wakefulness, ultimately leading to a pattern where falling asleep becomes more challenging. Understanding these mechanisms is important for anyone looking to improve their sleep hygiene and overall health.