Risk factors

A number of factors may increase your risk of Achilles tendinitis, including:

• Your sex. Achilles tendinitis occurs most commonly in men.
• Age. Achilles tendinitis is more common as you age.
• Physical problems. A naturally flat arch in your foot can put more strain on the Achilles tendon. Obesity and tight calf muscles also can increase tendon strain.
• Training choices. Running in worn-out shoes can increase your risk of Achilles tendinitis. Tendon pain occurs more frequently in cold weather than in warm weather, and running on hilly terrain also can predispose you to Achilles injury.
• Medical conditions. People who have psoriasis or high blood pressure are at higher risk of developing Achilles tendinitis.
• Medications. Certain types of antibiotics, called fluoroquinolones, have been associated with higher rates of Achilles tendinitis.