Piezogenic papules are protrusions of fat that form within the subcutaneous tissue of the skin.

[2] Risk factors include obesity, flat feet, athletics, figure skating, and long-distance running.

[3] They usually disappear when pressure is relieved; avoidance of prolonged standing, taping foot, compression stockings, heel cups, padding devices.

[1] Piezogenic papules are relatively common; in one small population-based study, the prevalence was found to be 76%.

[1] The same study found that it was not unusual to demonstrate the bumps when pressing a person's wrist.