The direct answer is that this fatigue stems from a combination of physiological, psychological, and environmental factors that reinforce one another.
First, prolonged exposure to blue light from smartphone screens inhibits the natural production of melatonin, the hormone responsible for regulating sleep. This disrupts the circadian rhythm, causing the body to remain in a state of alertness even after the person has stopped using the device.
Second, teenagers consume large amounts of digital content in back-to-back sessions without rest periods, which generates sustained cognitive overload. The brain processes fast, fragmented information as if it were under constant vigilance, similar to a high-intensity job, and this translates into accelerated mental exhaustion.
Third, there is solid scientific evidence that intensive device use before bedtime reduces sleep quality and increases nighttime drowsiness, creating a vicious cycle in which the teenager needs more screen time to stay awake, and then suffers even greater fatigue the following day.
Finally, the social and emotional disconnection associated with excessive use of digital networks contributes significantly to emotional fatigue. When young people rely on virtual interactions to meet real emotional needs, they can experience feelings of loneliness and exhaustion that manifest physically as extreme fatigue.
To combat this phenomenon, it is recommended to set clear limits on screen time, engage in regular physical activity, and create technology-free zones at home before bedtime.
