Achilles tendonitis is a painful condition caused by the inflammation of the Achilles tendon. The Achilles tendon attaches the heel of the foot to the calf muscles allowing the movement of plantar flexion or pointing of the foot.
Symptoms
Pain at the Achilles tendon, normally 4 inches above the heel, during activity and may also increase once activity has ceased. Tenderness can usually be felt along the course of the tendon and in some cases there may be the presence of a localized nodule (small sack of fluid) on the tendon. Another sign to look for is that the soles of shoes tend to wear out quickly around the heel region.
Causes
Excess Pronation (rolling over of the foot) causes extra strain on the tendon (See Orthotics)
Inflammation of the tendon is a common result along with tightening of the calf muscles
Inappropriate shoes. If the soles of the shoes are too stiff, this causes the forefoot to have limited movement. This can lead to increased tension to the Achilles tendon
The biggest contributing factor is ignoring the pain in the tendon
Sudden increases in training can lead to Achilles tendonitis