Hemorrhoids Around the World: Diet and Prevalence
Hemorrhoid prevalence has long been discussed as varying between countries and cultures, with dietary fiber intake — generally higher in some traditional diets than in heavily processed Western diets — proposed as a major contributing factor. The picture is genuinely informative, though less definitively settled than it’s sometimes presented.
- Lower-fiber Western diets are commonly proposed as a contributor to comparatively higher hemorrhoid rates in industrialized countries, though direct comparative data across countries is more limited than the theory’s popularity suggests.
- Toilet type (squatting vs. sitting) is another commonly discussed cross-cultural factor, though direct evidence specifically linking it to hemorrhoid rates is more limited than often claimed.
- The most consistently supported practical takeaway remains the same regardless of international comparisons: adequate fiber intake is directly, individually actionable and well-supported on its own merits.
The fiber hypothesis
The idea that low-fiber, heavily processed Western diets contribute to higher rates of hemorrhoids (along with related conditions like diverticular disease) has circulated in medical literature for decades, based partly on observations that populations with traditionally higher-fiber diets seemed to report lower rates of these conditions. This is a genuinely plausible mechanism, consistent with the well-established, individually tested benefit of fiber for hemorrhoid symptoms specifically (see Fibre: the single most effective intervention) — but robust, directly comparative international prevalence data specifically isolating diet as the cause (rather than other differences between populations and healthcare systems) is more limited than the popularity of this explanation might suggest.
The toilet-type hypothesis
A related, frequently discussed idea is that squatting-style toilets (more common in some parts of the world) reduce hemorrhoid risk compared to sitting-style toilets, by altering the anorectal angle and reducing straining. As covered in Toilet positioning and squatting stools, the direct research testing this specific claim is more mixed than the popular narrative suggests — at least one controlled study found no significant difference in a relevant physiological measure between sitting and squatting positions.
Why cross-country comparisons are genuinely difficult
Differences in healthcare access, diagnostic practices, willingness to report symptoms (see Why hemorrhoids are underreported), and study methodology all vary between countries in ways that make clean international prevalence comparisons difficult to interpret with confidence — a lower reported rate in one country could reflect genuinely lower prevalence, or simply less reporting and diagnosis.
What’s actually well-supported regardless of the international picture
Regardless of how international comparisons ultimately shake out, the individual-level evidence for fiber’s benefit — including direct meta-analysis data on hemorrhoid symptom outcomes — stands on its own and doesn’t depend on cross-cultural comparison data being conclusive (see Prevention: the fiber guide).
This page is for general education and represents an area with more popular narrative than rigorously settled comparative research.