Tendinous injuries about the foot and ankle are often the result of overloading and repetitive microtrauma stemming from training errors, poor technique, and the use of inappropriate surfaces or equipment. Other factors that must be considered include anatomic malalignment and muscle imbalance. Injuries involving tendons include inflammation, subluxation, and rupture. A correct and timely diagnosis should assist athletes, trainers, coaches, and physicians in preventing and treating these disorders.