Keeping smartphones next to the pillow is a common habit, but health professionals advise against it for several critical reasons. First, the bright screen of devices like the iPhone emits blue light, which directly suppresses the secretion of melatonin—the hormone responsible for regulating sleep cycles. Second, having a phone within arm's reach fosters anxiety, continuous stimulation, and nocturnal distractions that interrupt deep rest. Finally, maintaining a safe distance helps minimize exposure to radiofrequency radiation, supporting healthier long-term sleep hygiene.