This document discusses various foot injuries in three areas: rearfoot, midfoot, and forefoot. In the rearfoot, it describes plantar fasciitis, fat pad contusion, and calcaneal stress fractures. Plantar fasciitis is a degenerative condition of the plantar fascia caused by repetitive microtrauma. Fat pad contusions result from falls onto the heel. Stress fractures of the calcaneus can be seen on bone scans. In the midfoot, it discusses navicular stress fractures, extensor tendonitis, and midtarsal joint sprains. Navicular stress fractures require bone scans and CT scans for diagnosis. Extensor tendonitis causes dorsal midfoot pain. In the fore