The Hidden Cost of Nighttime Smartphone Usage in Young Adults

Dear Editor, We read with keen interest the recent article by Deshmukh and Sheth[1] and would like to share our perspective. The authors’ findings, which show a modest but significant correlation between excessive smartphone use, diminished sleep quality, and reduced attentional control, echo growing concerns in our clinical and research settings. Adolescents and young adults often present with complaints linked to insomnia, fatigue, and decreased concentration, symptoms that appear intertwined with their smartphone habits. In Spain, many family physicians and pediatricians report similar patterns,[2] particularly in urban areas where young individuals often use phones late into the night. The authors’ observation that poor sleep quality may stem from nighttime screen exposure resonates with existing data that highlight the role of artificial light in suppressing melatonin and disrupting circadian rhythms.[3] Moreover, as reported elsewhere, the practice of screen use before bedtime has been consistently linked with reductions in total sleep time and heightened daytime drowsiness.[4] While the association in the present study is characterized by a weak correlation, the implications in clinical practice are relevant. Excessive smartphone use, even at moderate levels, can slyly reduce the hours spent resting, leading to compromised cognitive function, mood disturbances, and possible long-term health risks. From the perspective of primary care in Spain, one of the challenges lies in bridging the gap between parental awareness and adolescent behavior. Many parents express uncertainty on how to regulate screen time, especially when smartphones are considered essential academic tools. Nonetheless, we have seen that structured advice, focusing on clear limits to evening usage and education about sleep hygiene, can bring tangible improvements. Intervention strategies that stress regular bedtimes, device-free periods before sleep, and an emphasis on relaxing nighttime routines enable patients to regain control over their digital habits. The modest but significant correlations found by Deshmukh and Sheth provide an additional motivation for these preventive measures, even before problematic smartphone use becomes severe. In addition to the impact on sleep, their findings on diminished attentional control point toward broader concerns about cognitive and emotional health. Earlier research has shown that increased smartphone dependency correlates with anxiety and lowered academic performance, which underscores the importance of early interventions in primary care.[5] When adolescents and young adults receive guidance from their family physician, they are more likely to recognize the need to set boundaries around their device use, particularly at night. We believe these behavioral modifications can help reduce potential cardiovascular and metabolic risks associated with long-term sleep disruption, as well as foster better mental health outcomes. Overall, the study by Deshmukh and Sheth makes a valuable contribution by drawing attention to how smartphone addiction may adversely affect both sleep patterns and attentional processes. Their results align with our clinical observations in Spain,[2] reinforcing the necessity of initiative-taking identification and management of these behaviors. We commend the authors for their thorough approach and hope their findings encourage further efforts to integrate digital use assessments into standard primary care consultations, promoting healthier sleep behaviors among young populations. Financial support and sponsorship Nil. Conflicts of interest There are no conflicts of interest.