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Another often-overlooked problem is increased stress levels. Many people use their phones as both their alarm clock and nightly entertainment, checking emails, social media updates, or news stories before closing their eyes. This habit keeps the mind stimulated long past bedtime, tricking the brain into staying alert. Even worse, studies suggest that simply having the phone in your hand—or under your pillow—creates a subconscious expectation of incoming messages, making the body stay in a low-level “alert mode” throughout the night.
But the most concerning consequence is one few people think about: heat accumulation. Phones running multiple apps, charging overnight, or receiving constant notifications can warm up significantly. While rare, overheating incidents have been documented, especially when the device is covered by a blanket or pillow. Beyond discomfort, this can pose an unnecessary fire risk many never expect.
