Many people sleep with a light on or with the TV playing, either because they fear the dark or find the background noise comforting. Doctors warn that, if this habit continues for a long time, it can harm the body by disrupting normal sleep and physiological rhythms.
Experts say the human body follows an internal clock known as the circadian rhythm, which responds to light and darkness. In darkness the body releases melatonin, a hormone that helps induce sleep. Light in the bedroom-or the glow from a television screen-reduces melatonin production and harms sleep quality.
Sleeping with the TV on does more than provide light. The screen’s changing light and the sound from the set keep the brain partially alert, which prevents deep, restorative sleep. As a result, people may wake up feeling tired and groggy even after a full night’s rest.
Beyond sleep itself, persistent exposure to artificial light at night can upset hormonal balance and metabolic processes. Studies have linked nighttime light exposure to disturbances in metabolism; over time this may increase the risk of weight gain, obesity and other metabolic problems.
Other research indicates that prolonged light exposure during sleep gradually erodes the body’s natural hormonal cycles and reduces overall sleep quality. The long-term effects can include daytime sleepiness, reduced attention and broader hormonal disturbances.
To protect sleep health, doctors recommend simple measures: switch off the TV and mobile devices before bed, keep the bedroom dark, and maintain a regular sleep schedule. These habits help the body recognize that it is time to rest.
While sleeping with lights or the TV on is a common practice, doing so regularly can affect hormones and metabolism. For better sleep and overall health, aim to sleep in a dark, quiet environment whenever possible.
Original Source: https://assam.nenow.in/know-how-sleeping-with-lights-on-is-bad-for-your-health/
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Publish Date: 2026-03-27 07:40:00
