The true prevalence is likely in the 75-85% range, consistent with the most recent published data. Painless piezogenic papules should be considered a normal finding or normal variant. They occur in all age groups and in both males and females, although they are reported more often in women than in men.
Cases in the same family have been described, however, given the almost universal prevalence of the condition, it is unlikely that these papules are hereditary. In most cases, painless piezogenic papules are not the result of an inherent connective tissue defect.