Trigger finger causes are not always readily apparent

Although trigger finger causes are not always apparent, once the tendon in your finger starts getting stuck, the condition usually gets progressively worse.

This can happen in one of three ways:

trigger-finger-causes.jpg The constant irritation or friction from the tendon getting stuck can cause the tendon to swell. That makes it harder for it to fit into the sheath.

The sheath is lined with a slick coating called tenosynovium. The irritation from the tendon can cause the lining to become inflamed (swollen), making the sheath narrower. 

The irritation from the tendon can cause a nodule (a small growth or lump of tissue) to form in the sheath, partially blocking it.

As the cycle of irritation and inflammation repeats itself, the tendon eventually gets stuck. The finger becomes locked in a bent position.

Sometimes, the tendon will pop free and, your finger will be able to move again. However, it may become stuck in a permanently bent position.

Cause of these problems is not fully understood

The cause of these problems is not fully understood and, in most cases, is never known. However, there are some factors that may cause trigger finger more likely.

In many cases trigger finger causes may be the result of repeated strain of this area. This may be due to work or hobby activities. Many other hand and upper extremity problems and repetitive motion disorders have been associated with trigger finger.

Tasks that require repetitive grasping or the prolonged use of tools (scissors, screwdrivers, etc) which press firmly on the tendon sheath at the base of the finger or thumb may irritate the tendons and result in thickening of the tendons themselves or the tendon sheath.

trigger finger causes

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Someone may be more prone to the development of a trigger finger if they routinely grip an item. Examples such as a power tool or musical instrument for extended periods of time come to mind..

Factors of trigger finger causes include:

Some trigger finger causes are associated with medical conditions such as rheumatoid arthritis, gout and diabetes.

Local trauma to the palm/base of the finger, repeated trauma from pistol- griped power tools, or long hours grasping a steering wheel can cause triggering.

Infection to the synovium causes a rounded swelling (nodule) to form in the tendon which may be a factor on occasion, but in most cases there is not a clear cause. 

Triggering can also be caused by a congenital defect that forms a nodule on the tendon. The condition is not usually noticeable until infants begin the use their hands. 

Trigger Finger may also be caused by an infection of the synovium, resulting in the scarring and formation of a nodule on the tendon.
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Trigger finger causes

Trigger finger causes:

While trigger finger often has no apparent cause, the factors below may make you more likely to develop it:

trigger-finger-in-womanIt is up to six times more common in women than men.

 

trigger-finger-in-childrenIt is more common in children under six years of age or in adults over 40, and is most common in people in their 50s or 60s.

 

trigger-finger-injuryIt is more common if you have injured the base of your finger or palm.

 

epetitive-movement

Repetitive movement and gripping, such as using power tools at work, may be linked to trigger finger, though there is no evidence to support this.

 

You may be more likely to develop trigger finger if you have any of the following medical conditions:

trigger-finger-diabetes Diabetes: a long-term condition that is caused by too much glucose in the blood.

rheumatoid-arthritis Rheumatoid arthritis: a long-term condition caused by a problem with your immune system (the body’s defence system) resulting in pain and stiffness in your joints.

Gout Gout: a short-term condition that causes inflammation (swelling) in one or more of your joints.

amyloidosis Amyloidosis: a condition where a protein called amyloid builds up in organs, such as your liver.

greybullet Hypothyroidism: having an under active thyroid gland, so that your body does not produce enough of certain hormones.

congestive-heart-failure Congestive heart failure: when your heart is not strong enough to pump blood efficiently around your body.

mucopolysaccharide-storage-disorders Mucopolysaccharide storage disorders: a group of rare disorders that cause progressive physical and sometimes mental disability.

carpal-tunnel-syndrome Carpal tunnel syndrome: a condition that affects the nerves in your wrist, causing pain and tingling.

dupuytren’s-contracture Dupuytren’s contracture: a condition that causes one or more fingers to bend into the palm of your hand.

De-Quervain’s-disease: De Quervain’s disease: a condition affecting the tendons in your thumb, causing pain in your wrist.

 

Mayo Clinic – Trigger Finger Causes and Treatment

 

Please see your GP


Always see your GP if you notice any clicking, stiffening or pain in your fingers or thumbs. Your GP will base a diagnosis on an examination of your hands and the history of your symptoms in an attempt to establish the trigger finger causes.

 


 

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