Pain and injury to the Achilles tendon are usually caused by tendinitis, which is triggered by overuse, an increase in physical activity, high heels, flat feet or overly tight muscles, according to WebMD. Sudden movements are more likely to tear or otherwise injure the tendon.
Athletes who participate in running, gymnastics, basketball and other team sports are more likely to injure their Achilles tendon, warns WebMD. Men over the age of 30 are also at greater risk for injury.
Pain along the back of the foot above the heal is a common symptom of injury to the Achilles tendon, states WebMD, especially if the pain worsens when standing on the toes or stretching. Tenderness, swelling, stiffness and difficulty flexing the foot are also common.
To treat pain caused by an injured Achilles tendon, WebMD suggests icing the area for 20 to 30 minutes every three to four hours. Typically, this treatment lasts two to three days, but it should be continued for as long as the pain persists. Anti-inflammatory painkillers are also suggested. An individual should avoid putting weight on his leg until pain desists and use an elastic bandage to reduce the swelling. The leg should be kept elevated as often as possible.