A study of ailments of the feet in pilgrims of Hajj revealed that 31% of them suffered from blisters, and the prevalence was five times higher in females. The presence of comorbidity (diabetes, obesity and advanced age) warrants immediate attention to them to avoid serious complications.
Sridhar, S., Benkouiten, S., Belhouchat, K., Drali, T., Memish, Z. A., Parola, P., … Gautret, P. (2015). Foot ailments during Hajj: A short report. Journal of Epidemiology and Global Health, 5(3), 291–294. https://doi.org/10.1016/j.jegh.2014.12.007