Keeping Your Phone Close While Sleeping May Harm Your Brain, Say Experts

Many people place their smartphones right next to their beds while sleeping, thinking it’s convenient. However, neurologists warn that this common habit can interfere with the brain’s natural sleep mechanisms and affect overall health. The combination of blue light from screens, notifications vibrating during the night, and the tendency to scroll endlessly before closing your eyes can disturb the body’s biological rhythm. Over time, these disruptions can affect not only sleep but also physical health, emotional stability, and cognitive performance.

Dr. Jyoti Bala Sharma, Director of the Neurology Department at Fortis Noida, emphasizes that keeping phones near the head while sleeping can disturb the brain’s natural “night signals,” which are essential for restorative sleep.

Why Sleep Is Essential

Sleep is far more than a pause from activity—it is a vital process during which the body repairs cells, processes information, and restores the brain’s capacity to function. According to Dr. Sharma, sleep helps remove daily stress, balances emotions, clears toxic build-up in the brain, regulates blood pressure, strengthens immunity, and consolidates memory. Without sufficient sleep, individuals may experience fatigue, irritability, lack of concentration, and mental fog.

How Smartphones Disrupt the Body’s Internal Clock

The human body operates on a circadian rhythm—a natural biological clock controlled by light. Morning sunlight signals the body to wake up, while evening darkness stimulates the production of melatonin, the hormone that promotes sleep. Smartphones and other screens disrupt this system. The blue light they emit tricks the brain into thinking it’s daytime, lowering melatonin levels and preventing the brain from receiving its natural signal to sleep.

A 2025 study published in JAMA Network Open found that individuals using screens within an hour of bedtime were 33% more likely to experience poor sleep quality. On average, these people slept eight minutes less and reported persistent fatigue and grogginess in the morning.

Late-Night Scrolling Keeps the Brain Alert

It is not just the light but also the content that stimulates the brain. Reading messages, scrolling through social media, watching videos, or checking emails keeps the brain active, making it harder to fall into deep, restorative sleep. Frequent waking during the night and not feeling refreshed upon waking are common signs of this disruption.

Steps to Improve Sleep Quality

Experts recommend avoiding screens at least one to two hours before bedtime to allow melatonin production to normalize. Keeping the bedroom dark, using dim red lighting if needed, and spending time in morning sunlight can help stabilize the circadian rhythm.

Keeping phones outside the bedroom is also highly effective. Dr. Sharma explains, “When the phone is out of reach, the mind relaxes. Many people don’t realize how much the constant presence of a phone disrupts their sleep.” Using Do Not Disturb mode, turning off notifications, or charging the phone in another room are simple yet powerful strategies.

Healthy Habits Beyond Screen Time

Reducing screen time alone isn’t enough. Experts suggest eating a light meal a few hours before bed, avoiding heavy, spicy, or oily foods late at night, and exercising for 30–45 minutes during the day. Intense workouts close to bedtime should be avoided. Simple routines such as light reading, listening to soft music, practicing breathing exercises, or dimming the lights before sleep can relax the body and promote better rest.

Why This Matters Now More Than Ever

As digital devices have become integral to daily life, understanding their impact on sleep is crucial. Poor sleep can lead to chronic fatigue, mood swings, lack of focus, and an increased risk of illness. However, many people fail to make the connection between these problems and their screen habits.

Dr. Sharma concludes, “The more immersed we are in the digital world, the more important it is to set strict boundaries around sleep. Good sleep is not a luxury—it is a fundamental requirement for both mental and physical health.”