Tendonitis is a chronic overuse injury, and can involve any of the tendons in the foot. When it occurs, there is inflammation within the tendon sheath. This causes localized pain and pain with specific motions.
Treatment of tendonitis consists of rest, ice, compression, and elevation. Anti-inflammatory medications can help decrease swelling and pain. Usually some type of immobilization is necessary so that the tendon can rest and heal properly. This is usually administered in the form of a brace or an immobilizing boot, depending on the tendon involved and the severity.
If you do not respond to usual treatment methods, further testing may be necessary to make sure there is not more damage to the tendon, namely a rupture of the tendon or a large tear.