Do You Sleep Next To Your Phone? 5 Potential Health Risks You Should Know

For many people, checking their phone is the last thing they do before sleeping and the first thing they do after waking up. Whether it is kept under the pillow, on the bedside table, or beside the bed while charging, a mobile phone has become a constant companion, even at night.

However, nighttime phone use may affect sleep quality, encourage unhealthy screen habits, and create avoidable safety risks. While concerns about mobile phone radiation are common, current scientific evidence has not established that simply keeping a phone near your bed causes cancer or other serious health conditions. According to Dr Tushar Tayal, Associate Director - Internal Medicine at CK Birla Hospital, Gurugram, understanding the actual risks can help you make safer choices.

1. Blue Light Can Disrupt Your Sleep

One of the better-established concerns associated with nighttime phone use is its effect on sleep.

Mobile phone screens emit blue light, which can influence the body’s internal clock, also known as the circadian rhythm. According to a study published in the journal 'Personal and Ubiquitous Computing', exposure to light in the evening can suppress melatonin, a hormone that helps regulate the sleep-wake cycle. The effect depends on the brightness, duration, and timing of exposure.

Scrolling through social media, watching videos, or reading messages before bed may delay sleepiness and make it harder to fall asleep. Engaging content can also keep the brain alert, even when screen brightness is reduced.

What you can do

• Avoid using your phone for at least 30-60 minutes before bed, particularly if you have difficulty falling asleep.
• Keep the bedroom dim and follow a consistent sleep schedule.
• Night mode may reduce some blue light exposure, but it does not eliminate the effects of stimulating content or prolonged screen use.

2. Notifications Can Interrupt Your Sleep

Even when you are not actively using your phone, notifications, calls, and vibrations can disturb your rest.

A message alert may wake you up or cause a brief interruption that you may not remember the next morning. Repeated disturbances can affect sleep continuity and leave you feeling tired, irritable, or less focused during the day.

Keeping your phone within easy reach can also encourage you to check messages whenever you wake up during the night. Over time, this habit may make it harder to maintain an uninterrupted sleep routine.

What you can do

• Switch on Do Not Disturb mode or silent mode before bed.
• Allow calls from essential contacts if necessary, and place your phone away from the pillow to reduce the temptation to check it.

Also Read: Do Constant Notifications Keep Your Brain in Stress Mode?

3. Does Phone Radiation Pose a Health Risk?

Mobile phones emit radiofrequency (RF) energy, a form of non-ionising electromagnetic radiation. Unlike ionising radiation, such as X-rays, RF energy does not have enough energy to directly damage DNA in the same way.

Research into the possible long-term health effects of mobile phone radiation is ongoing. The International Agency for Research on Cancer has classified radiofrequency electromagnetic fields as ‘possibly carcinogenic to humans’ (Group 2B). This classification indicates that a potential hazard could not be ruled out; it does not establish that mobile phone use causes cancer.

Subsequent research, including a large prospective study published in 2024, has not found an increased risk of brain tumours among people with the highest cumulative mobile phone call time compared with lighter users. Overall, current scientific evidence has not established a causal relationship between mobile phone use and cancer. There is also no convincing evidence that simply sleeping near a mobile phone causes cancer.

What you can do

• Keeping a phone beside your bed is different from holding it against your head during a call.
• If you prefer to reduce RF exposure, you can keep your phone farther away, use speaker mode for calls, or switch on aeroplane mode when connectivity is not needed.

4. Charging Your Phone Under Your Pillow Can Be Dangerous

A more immediate and preventable concern is the risk of overheating when a phone is charging in an enclosed space.

Placing a charging phone under a pillow, blanket or mattress can trap heat and interfere with heat dissipation. Damaged batteries, faulty chargers and damaged cables can further increase the risk of overheating, burns or fire.

Phones and chargers should always be used according to the manufacturer’s instructions, with adequate ventilation.

What you can do

• Charge your phone on a hard, flat surface away from bedding and other flammable materials.
• Use a compatible charger and cable, and avoid charging devices with visibly damaged batteries or cables.
• Never charge a phone under your pillow or mattress.

5. Late-Night Scrolling Can Affect Mental Wellbeing

Keeping your phone beside your bed can make it tempting to check work emails, news updates, or social media late at night.

Constant access to information may encourage overthinking, particularly when you encounter upsetting news or feel pressured to respond to messages immediately. Social media comparisons and work-related notifications can also make it difficult to mentally switch off.

Keeping a phone nearby does not automatically cause anxiety or depression. However, excessive nighttime screen use can contribute to stress, delay sleep and worsen sleep quality, which may affect emotional wellbeing over time.

What you can do

• Set a cut-off time for work messages and social media.
• Try reading a physical book, listening to relaxing audio or practising slow breathing before bed.

Should You Keep Your Phone Away While Sleeping?

You do not necessarily need to leave your phone in another room. However, keeping it away from your pillow can encourage healthier sleep habits and reduce avoidable safety risks.
Place it on a bedside table or another stable surface, activate Do Not Disturb mode, and avoid using it immediately before sleeping. If you use your phone as an alarm, keep it on a stable surface away from bedding rather than under your pillow.

Ultimately, the biggest established concerns are sleep disruption, nighttime interruptions, and unsafe charging practices rather than proven harm from simply being near a phone.
A few small changes to your bedtime routine can help you protect your sleep without giving up the convenience of having your phone nearby.