Piezogenic papule is the term used to describe the soft, skin-colored painful papule that appears when standing on the nonweight-bearing portion of the heel and which disappears when weight is taken off the foot. These papules are thought to be due to herniation of fat. Four cases are reported.
Cohen HJ, Gibbs RC, Minkin W, Frank SB. Painful Piezogenic Pedal Papules. Arch Dermatol. 1970;101(1):112-113. doi:10.1001/archderm.1970.04000010114023