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What Is Tendinitis?

Tendinitis is a condition in which the tissue that connects the bone to the muscle becomes inflamed or irritated. The stress on this tissue—called the tendon—can cause severe pain and make movement and function difficult or impossible. Tendinitis is commonly experienced in the hand, wrist, and forearm, making movements like grabbing and reaching difficult. Because these extremities are responsible for many necessary functions, living with tendinitis can prevent you from completing simple daily tasks and diminish your overall quality of life.

Hand (Trigger Finger)

Tendinitis of the hand is commonly referred to as “trigger finger” or “trigger thumb”—a condition marked by difficulty bending and straightening the fingers. This occurs when the tendon connecting the base of your finger and palm becomes swollen. While the exact cause of trigger finger is unknown, repetitive motions and forceful gripping has been known to cause tendon swelling in this area. Activities like playing an instrument, carpentry, gardening, or playing sports can increase the risk of tendinitis in the hand.

Once the tendons in fingers become swollen, forcing the finger to flex will often cause a popping or snapping sound. Other symptoms of tendinitis in the hand may include:


With comprehensive treatment, painless movement of the fingers and thumbs can be achieved. Many times, swollen tendons in the hand can be addressed with non-surgical options, such as:

If less invasive methods of treatment do not address your symptoms, a surgical procedure can be performed by one of our New York hand surgeons to open up the tendon sheath (layer covering the tendon), allowing for easier movement and helping the tendons in your hand glide more freely. While some stiffness may occur after surgery, physical hand therapy can help this area regain proper function.

Wrist (De Quervain’s Tendinosis)

When tendons on the thumb side of the wrist become swollen, the condition is commonly known as De Quervain’s tendinosis. The swelling of tendons in this area can make many thumb movements—such as grasping and twisting—very painful. While the cause of De Quervain’s tendinosis is generally unknown, the condition is often linked to overuse, repetitive motion, hormonal changes caused by pregnancy, and rheumatoid disease. Common symptoms may include:


Treatment for tendinitis in the wrist can work to reduce the pain and irritation of the condition. Many non-surgical options have been known to address symptoms; however, in some cases, surgery may be necessary if there is no improvement or symptoms worsen.

Forearm (Intersection Syndrome)

Intersection syndrome is a condition commonly associated with tendinitis in the lower forearm, usually a few inches from the wrist. Swollen tendons in this area can no longer glide easily, causing pain when flexing, extending, and rotating the forearm. Any athletic or general activity that involves repetitive wrist flexing can cause intersection syndrome. Common symptoms of the condition may include:


A physical examination or ultrasound may be necessary to distinguish intersection syndrome from De Quervain’s tendinosis, but the location of pain is usually a good indicator of your condition. In general, non-surgical treatment for tendon swelling in the forearm may include:

If these methods fail to improve your symptoms, surgery may be recommended. Should this happen, our experienced reconstructive hand surgeons can determine the procedure that will most benefit you and create a treatment plan to address your unique needs. After surgery, physical hand therapy can help the area regain function, with full recovery generally expected in several weeks.

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