What is Achilles tendinitis?

What is Achilles tendinitis?

Overuse of the Achilles tendon may cause the tendon to swell, become irritated, inflamed, and painful. This is Achilles tendinitis. It is a common sports injury that is related to running, but it can happen to anyone who puts a lot of stress on their feet (e.g., basketball players and dancers). If one does not get treatment for Achilles tendinitis, the problem can become chronic (long-term) and make it difficult to walk.