Bright screens can interfere with this process.
When the eyes detect intense light late at night, the brain may interpret it as a sign that it is still daytime. As a result, melatonin production can be delayed.
People may find themselves staying awake longer, taking more time to fall asleep, or feeling less sleepy than expected despite physical tiredness.
Researchers continue to study the exact magnitude of these effects, but many sleep specialists recommend reducing screen exposure before bedtime.
Why "Just Five Minutes" Often Becomes Much Longer
Another challenge associated with bedtime phone use is the tendency to lose track of time.
Many people intend to check only one message or browse for a few minutes.
Then thirty minutes pass.
Then an hour.
Digital platforms are designed to keep users engaged.
Endless scrolling, autoplay videos, personalized recommendations, and constant updates encourage continued interaction.
The brain receives frequent stimulation through new information, images, and social interactions.
Instead of gradually winding down for sleep, the mind remains active and engaged.
This heightened mental activity can make relaxation more difficult.
Even after putting the phone away, the brain may continue processing information, delaying the transition into restful sleep.
Mental Stimulation and Sleep
Sleep is not simply a physical process.
Mental relaxation plays a major role as well.
Reading stressful news, responding to work emails, participating in heated discussions, or consuming emotionally charged content before bed can increase mental arousal.
The brain remains alert when exposed to stimulating material.
Some individuals may experience: