Tendinitis

Tendinitis (often spelled tendonitis) and bursitis are conditions that affect the tendons and bursae of the joints. The term tendon refers to the connective tissue that joins two muscle groups. Stability and flexibility are essential for healthy tendon function. The muscles and tendons power our joints, allowing us to move. The bursae (plural for "bursa") are sac-like fluid filled structures that allow the tissue structures to glide smoothly against each other.Since both tendons and bursae are located near joints, inflammation in these tissues will often be perceived as joint pain and mistaken for arthritis. The symptoms of bursitis and tendinitis are similar: pain and stiffness made worse by movement. Pain may be worse at night.
Although tendinitis and bursitis are usually temporary conditions, they may become recurrent or chronic problems.