Terpene October 14, 2016October 24, 2016 thcscience_admin Surfer's knots are a cutaneous condition caused by chronic pressure over bony prominences leading to thick fibrotic nodules on knees, knuckles, dorsal feet, often seen with those who perform surfing, boxing, football, and marbles.[1] See also[edit] Turf toe Tennis toe List of cutaneous conditions References[edit] ^ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. p. 1371. ISBN 978-1-4160-2999-1.