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Inflammation of a tendon is called tendinitis. Achilles tendinitis is a common condition that causes pain along the back of the leg, near the heel. Although the Achilles tendon can withstand great stresses from running and jumping, it is also prone to tendinitis.

An Achilles tendon rupture is a complete or partial tear that occurs when the Achilles tendon is stretched beyond its capacity. Forceful jumping or pivoting, or sudden accelerations of running, can overstretch the tendon and cause a tear. An injury to the tendon can also result from falling or tripping.

Basic types of peroneal tendon injuries are tendinitis, acute and degenerative tears, and subluxation. Peroneal tendon injuries occur most commonly in individuals who participate in sports that involve repetitive or excessive ankle motion. People with higher arches have an increased risk for developing peroneal tendon injuries.

Posterior tibial tendon dysfunction is one of the most common problems of the foot and ankle. It occurs when the tendon becomes inflamed or torn, which impairs the tendon’s ability to provide stability and support for the arch of the foot, resulting in flatfoot.