Screens, Caffeine, and Alcohol: How Everyday Habits Affect Your Sleep

You might be doing all the "right" things for sleep — going to bed on time and keeping your bedroom dark — and still waking up tired. Sometimes the culprits are everyday habits that seem harmless: scrolling your phone in bed, an afternoon latte, or a drink to unwind.

Here's how screens, caffeine, and alcohol can affect your sleep, and what you can do about it.

Screens and sleep

How screens interfere

• Light exposure: Bright light in the evening — including light from screens — can signal your brain that it's still daytime, which may make it harder to feel sleepy.
• Mental stimulation: Emails, news, social media, games, and exciting shows keep your brain alert.
• Time displacement: "Just one more video" can easily push bedtime back by an hour.
• Interruptions: Notifications during the night can wake you up.

What to do

• Set a "screens off" time 30 to 60 minutes before bed.
• Charge your phone outside the bedroom, or at least across the room.
• Turn on "do not disturb" or a bedtime mode.
• Swap scrolling for a relaxing bedtime routine, such as reading a paper book.
• If you must use a device, lower the brightness and choose calm content.

For broader strategies, see our guide to digital wellness and screen time.

Caffeine and sleep

How caffeine works

Caffeine is a stimulant that blocks signals in the brain that promote sleepiness. Its effects can last for several hours after you drink it, so even a mid-afternoon cup may still be affecting you at bedtime.

Common sources include coffee, tea, energy drinks, many sodas, pre-workout supplements, some pain relievers, and chocolate.

What to do

• Many people sleep better if they avoid caffeine after early afternoon. Experiment to find your personal cutoff.
• Check labels on energy drinks and supplements, which can contain large amounts.
• Gradually cut back if you drink a lot, to avoid withdrawal headaches.
• Switch to decaf or herbal tea later in the day.

The FDA has noted that for healthy adults, up to about 400 milligrams of caffeine per day — roughly four or five cups of coffee — is generally not associated with dangerous effects. But sensitivity varies, and that amount may still interfere with sleep for some people. People who are pregnant, have heart conditions, or take certain medications should ask their healthcare provider about caffeine.

Alcohol and sleep

How alcohol affects sleep

Alcohol is a depressant, so it can make you feel drowsy and fall asleep faster. But as your body processes it during the night, sleep often becomes lighter and more broken. You may wake more often, especially in the second half of the night, and feel less rested in the morning. Alcohol can also worsen snoring and sleep apnea.

What to do

• Avoid drinking close to bedtime.
• If you choose to drink, do so in moderation. The Dietary Guidelines for Americans advise adults who drink to limit intake, and note that drinking less is better for health than drinking more.
• Don't use alcohol as a sleep aid.

If you find it hard to cut back on alcohol, talk with your healthcare provider or visit FindTreatment.gov for confidential help.

Other everyday habits that affect sleep

• Large, late meals can cause discomfort or heartburn.
• Nicotine is a stimulant and can disrupt sleep. For help quitting, visit Smokefree.gov.
• Irregular schedules confuse your body clock.
• Long or late naps reduce sleep pressure at night.
• Lack of daytime activity — regular movement supports better sleep.

A simple evening reset

1. Finish caffeine by early afternoon.
2. Eat dinner at least 2 to 3 hours before bed when possible.
3. Skip alcohol close to bedtime.
4. Turn off screens 30 to 60 minutes before bed.
5. Follow a calming wind-down routine.

The bottom line

Screens, caffeine, and alcohol are part of daily life for many people, but their timing matters for sleep. Small changes — an earlier caffeine cutoff, a screen-free wind-down, and avoiding alcohol before bed — can help you fall asleep more easily and wake up more refreshed.

If sleep problems continue despite healthy habits, talk with a healthcare provider. Our sleep hygiene checklist is a good next step.