Tendonitis
Tendonitis is an inflammation or irritation of a tendon. Chronic strain, overuse or misuse of a tendon can lead to a repetitive stress injury, or a serious acute injury, leading to a weakness, tear or swelling of the tendon tissue resulting in pain and stiffness near the tendon.
Tendonitis usually occurs at the thumb, elbow, shoulder, hip, knee, heal and wrist, but can occur anywhere there is a tendon, and is a commonly associated sports injury. It can also be age-related as tendons lose their elasticity and ability to glide as smoothly as they used to.