Tendonitis is an inflammation or irritation of a tendon-fibrous cord that attaches muscle to bone. It results from overuse of the affected tendon. This can happen as a side effect of overtraining syndrome.

Symptoms
The most significant symptom is a sharp or aching pain around the affected tendon and a reduced range of motion in the area.

Types of tendonitis
Tendonitis can be of several types, based on the area where the inflammation occurs. The most common types of tendonitis include Achilles, bicep, elbow, or rotator cuff.