A common modern habit -- using smartphones while on the toilet -- is being linked to a significantly increased risk of developing hemorrhoids (also known as piles), according to new research published in PLoS One by a team from Beth Israel Deaconess Medical Center and Harvard Medical School.

The study, which conducted a multivariate analysis of smartphone use and hemorrhoid prevalence, suggests that the passive engagement offered by mobile devices inadvertently prolongs toilet visits, leading to health consequences previously underappreciated.

The findings indicate that smartphone users on the toilet face a 46% increased risk of hemorrhoids after accounting for factors such as age, sex, body mass index (BMI), exercise activity, straining, and fiber intake.

This revelation challenges traditional understanding, which often emphasizes straining as a primary cause of hemorrhoids. In this study, straining was not found to be an independent predictor of hemorrhoids, nor were there differences in straining between smartphone and non-smartphone users.

The Mechanism: Prolonged, unsupported pressure

The core reason behind this increased risk appears to be the extended duration of sitting on the toilet. Participants who used smartphones on the toilet spent considerably more time there compared to those who did not. Specifically, 37.3% of smartphone users spent more than five minutes per visit on the toilet, a stark contrast to just 7.1% of non-smartphone users.

Researchers propose that sitting on a standard toilet seat, which lacks support for the pelvic floor, disproportionately increases pressure in the hemorrhoidal cushions. Unlike prolonged sitting in other environments (like a desk or couch where the pelvic floor is supported), the unsupported posture on a toilet seat, when maintained for extended periods, causes these cushions to become engorged and eventually develop into noticeable hemorrhoids.

"This extended duration may be linked to the passive engagement that smartphones facilitate, potentially resulting in prolonged sitting and increased pressure in the hemorrhoidal cushions," the study authors explain.

Interestingly, despite objective reports of prolonged sitting, only 35% of smartphone users acknowledged that their device use led to longer toilet times, highlighting an "inadvertent and unintended consequence" of the behaviour.

Growing modern habit with health implications

Smartphones have become an integral part of daily life, with 66% of the study's respondents admitting to using them while on the toilet. The most common activities included reading news (54.3%) and engaging with social media (44.4%). The study also found that smartphone users on the toilet were generally younger (mean age 55.4 vs. 62.1 for non-users) and engaged in less exercise, potentially signaling a more sedentary lifestyle overall.

Hemorrhoids are a significant public health burden, accounting for nearly 4 million outpatient visits annually and over $800 million in healthcare expenditure. This new research adds a crucial piece to the puzzle of identifiable risk factors, which have historically included constipation, low fiber intake, pregnancy, obesity, and general sedentary behavior.

Recommendations for healthier habits

The study's findings provide valuable information for clinical care, bolstering advice to restrict smartphone use while on the toilet to under five minutes. Healthcare providers are encouraged to discuss lifestyle behaviors, including technology use, when addressing gastrointestinal health concerns with patients.

Educational interventions, such as using timers, could also promote healthier toilet habits and potentially reduce the prevalence of hemorrhoids.

While this cross-sectional study cannot definitively establish causation and relies on self-reported data, its robust multivariate analysis offers strong evidence of a significant correlation.

As smartphone use continues to be ubiquitous, understanding its impact on various aspects of health, including previously overlooked areas like toileting habits, becomes increasingly vital. Future research, particularly longitudinal studies, could further track the long-term effects of smartphone use on hemorrhoid incidence.

In essence, much like an overinflated balloon that eventually stretches and weakens, the sustained, unsupported pressure on the hemorrhoidal cushions from prolonged toilet sitting, often enabled by smartphone use, can lead to their engorgement and the development of hemorrhoids over time.