Smartphone Toilet Use Linked to 46% Higher Risk of Hemorrhoids, New Study Finds

Most people who scroll their phones on the toilet have probably never thought of it as a health risk. It is a habit so normalized that it barely registers as a behavior worth examining. But a new study has put a specific number on what coloproctologists have been anecdotally warning about for years: people who habitually use their smartphones during bathroom visits had a 46% higher risk of developing hemorrhoids than those who did not. That is a meaningful statistical association, and the mechanism researchers point to is not complicated — phones make people sit longer, and sitting longer on the toilet is one of the clearest known contributors to hemorrhoid development.

The Mechanics of Why This Happens

Hemorrhoids are cushions of tissue containing blood vessels, muscle, and connective tissue that are present in everyone's anal canal. They become a problem when they become swollen, inflamed, or prolapsed — pushed out of their normal position by increased pressure. The toilet seat creates an unusual pressure distribution on the perineal region that, over extended sitting periods, reduces venous return from the tissues of the anorectal area. Blood pools, the vascular cushions engorge, and repeated episodes of this over time contribute to the chronic swelling and irritation that characterizes hemorrhoid disease.

A smartphone changes the bathroom experience from a brief functional visit to something more like a leisure activity. Without the phone, most people finish what they came to do and leave. With the phone, they read an article, scroll a social feed, respond to messages, or watch a video — activities that are engaging enough to suppress the natural cues telling them they are done and should stand up. The average smartphone toilet session runs considerably longer than a non-smartphone visit, and that extra time is spent with sustained perineal pressure that the body was not designed to tolerate repeatedly over years.

How the Study Was Conducted

The research involved survey-based data collection from a defined patient population that included individuals with diagnosed hemorrhoid disease and a comparison group without the condition. Participants reported their bathroom habits, including whether they used smartphones, read printed materials, or engaged in other activities during toilet visits, along with information about bathroom session duration, diet, fluid intake, physical activity, and other established hemorrhoid risk factors. The 46% increased risk associated with habitual smartphone use was reported after controlling for confounding variables, suggesting the association is not simply explained by other lifestyle factors that might correlate with both phone use and hemorrhoid risk.

Like most observational studies of this kind, the research establishes association rather than definitively proving causation. It is possible that some of the association reflects reverse causation — people who already have hemorrhoids and experience discomfort during bowel movements may be more likely to distract themselves with phones during bathroom visits. The researchers acknowledged this limitation, but the biological plausibility of the mechanism and the magnitude of the association support taking the finding seriously rather than dismissing it as statistical noise.

This Fits What Colorectal Specialists Already Know

The study's findings are not surprising to colorectal surgeons and gastroenterologists who have been seeing the clinical consequences of prolonged toilet sitting for years. Hemorrhoid disease has been increasing in prevalence among younger adults — a trend that predates smartphones but has potentially been accelerated by them. The same advice physicians have long given to reduce hemorrhoid risk — keep bathroom visits brief, do not strain, get adequate dietary fiber, stay hydrated — all operate on the same underlying principle: minimize time and pressure on the anal cushions.

Reading material in the bathroom predates smartphones by a long time, and it is not a new concern for colorectal health professionals. But smartphones represent a qualitative escalation in the distraction and engagement offered by bathroom reading material. A magazine article has a defined end. A social media feed does not. The infinite scroll design of most platforms is specifically engineered to maximize time-on-platform, and that engineering is working in a context — the toilet — where the physiological consequences of extended time are directly harmful.

The Practical Takeaway

Hemorrhoids affect a substantial proportion of the adult population — estimates suggest that by age 50, roughly half of adults have experienced hemorrhoid symptoms at some point. Treatment ranges from dietary and lifestyle modification for mild cases to rubber band ligation, sclerotherapy, and surgical hemorrhoidectomy for more severe presentations. The condition is not life-threatening but can be significantly painful, disruptive, and embarrassing, with substantial impact on quality of life during flare-ups.

If leaving the phone outside the bathroom reduces hemorrhoid risk by the margin this study suggests, it is one of the simplest and cheapest preventive health interventions available — costing nothing and requiring only a modest behavioral change. Whether people will actually make that change is another matter. Habits built over years of smartphone saturation are not easily broken, and the bathroom has become one of the few spaces where phone use feels entirely private and judgment-free. But for anyone who has experienced hemorrhoid symptoms and is looking for modifiable risk factors, this study provides a concrete, actionable data point that most colorectal specialists will have little hesitation recommending patients act on.