Background
Piezogenic papules are painful or asymptomatic papules of the feet and wrists that result from herniation of fat through the dermis. They are common, nonhereditary, and usually are not the result of an inherent connective tissue defect. Piezogenic papules of the wrist were reported in 1991.
They are found in a large number of asymptomatic people. See the image below.
Piezogenic pedal papules. Courtesy of DermNet New Zealand (https://www.dermnetnz.org/assets/Uploads/dermal-infiltrative/piezogenic-papules5.jpg).