Using a phone late at night can affect the body’s natural sleep-wake cycle, making it harder to fall asleep and potentially reducing the quality of rest throughout the night.Sleep Disorders
One of the main reasons is the light coming from the screen.
The body follows a natural 24-hour rhythm that helps regulate when you feel alert and when you begin to feel sleepy.
As evening approaches, the brain normally increases production of melatonin, a hormone that helps signal that it is time to rest.
Bright screen exposure can interfere with that process.
Phones, tablets, and other digital devices emit light that includes blue wavelengths.
When the eyes are exposed to bright light late at night, the brain can interpret that signal as if it is still daytime.
As a result, melatonin production may be delayed or reduced.
That can leave you lying awake longer than expected, even when your body feels physically tired.