Tendons are the fibrous structures that join muscles to bones. When these tendons become swollen or inflamed, it is called tendinitis. In many cases, tendinosis (tendon degeneration) is also present.
Tendinitis can occur as a result of injury or overuse. Playing sports is a common cause. Tendinitis also can occur with aging as the tendon loses elasticity. Body-wide (systemic) diseases, such as rheumatoid arthritis or diabetes, can also lead to tendinitis.
Tendinitis can occur in any tendon. Commonly affected sites include:
- Heel (Achilles tendinitis)
Symptoms of tendinitis may vary with activity or cause. Main symptoms may include:
- Pain and tenderness along a tendon, usually near a joint
- Pain at night
- Pain that is worse with movement or activity
- Stiffness in the morning
During a physical exam, your health care provider will look for signs of pain and tenderness when the muscle attached to the tendon is moved in certain ways. There are specific tests for specific tendons.
The tendon can be inflamed, and the skin over it may be warm and red.
Other tests that may be done include:
Tendinitis can be prevented by:
- Avoiding repetitive motions and overuse of the arms and legs.
- Keeping all your muscles strong and flexible.
- Doing warm up exercises at a relaxed pace before vigorous activity.
The goal of treatment is to relieve pain and reduce inflammation.
The provider will recommend resting the affected tendon to help it recover. This may be done using a splint or a removable brace. Applying heat or cold to the affected area can help.
Over-the-counter pain relievers such as NSAIDs like aspirin or ibuprofen, can also reduce both pain and inflammation. Steroid injections into the tendon sheath can also be very useful for controlling pain.
The provider may also suggest physical therapy to stretch and strengthen the muscle and tendon. This can restore the tendon's ability to function properly, improve healing, and prevent future injury.
In rare cases, surgery is needed to remove the inflamed tissue from around the tendon.