Have you ever heard of trigger finger? This symptom can cause pain in your fingers and cause difficulty in straightening your fingers. This interesting name is because, if you suffer from this symptom, then straighten the joint, it may produce something like the sound. Here is a description of the causes, symptoms, and treatment of the board machine.

trigger finger the cause of occurrence

The official name of the board machine is Stenosing tenosynovitis of the finger, mainly due to excessive use of fingers, such as hydropower Workers, craftsmen, bakers and housewives are all good people. In addition, women, patients with Diabetes and Rheumatoid arthritis are also more likely to have a trigger finger.

You may have heard of pain in the elbow and wrist, such as tennis elbow or gamer’s thumb’s hand, and the trigger finger is the same as they are, due to excessive and frequent pressure on the joints, resulting in swelling and swelling. The reason why there is a so-called “clasp machine” sound is mainly because the patient who bends his finger and then straightens again may get stuck. If you continue to straighten, you will hear Similar to the sound of the clasp machine.

Inflammation of tendon and tendon sheath.

To understand why there is sound, first understand the concept of tendon and tendon sheath, which is the soft tissue in the human body that connects muscles and bones, and the tendon sheath is a hollow tubular structure, like a tunnel. In general, while the tendon is the train in which it is traveling. In general, the tendon can slide smoothly in the tendon sheath when your fingers are bent and straightening, but when we put too much pressure on your fingers, it can cause tendon inflammation; we all know When the tissue is inflamed, it will always swell, and if placed, it may produce nodules, causing “stuck” to occur, which is the reason for the so-called “board sound”.

Swelling is the main symptom of the trigger finger

The difficulty of stretching your fingers and the sound of the board may be accompanied by pain. You may also feel stiff, sore, or swelling in the connection of your fingers and your palms. The most obvious when you get up early in the morning.

5 methods of treatment trigger finger

Depending on the severity of the symptoms, there may be 5 different treatments:

Plywood Fixing

Your doctor may use the splint to hold your finger in place to avoid frequent flexure movements, resulting in constant pain.

anti-inflammatory drugs

NSAIDs, such as Ibuprofen, can help tendons quickly to eliminate swelling. In general, taking anti-inflammatory drugs with enough rest, most of the symptoms are found in the Healed within weeks.

Steroid Injection

If anti-inflammatory drugs are not effective, doctors may consider injecting steroids directly in the affected area to speed up the anti-inflammatory process, but may cause pain in the affected area after injection.

Stretching and rehabilitation

Once the symptoms of tendon inflammation have improved, you can perform some finger stretching movements, so that the movement of your fingers can return to normal as soon as possible.


If the symptoms of the trigger finger have continued for a long time and there has been no significant improvement after 2 steroid injections, the doctor may recommend surgical treatment such as percutaneous decompression ( Percutskin release, which inserts the needle into the affected area after local anesthesia, removes the sticky part of the tendon, allowing the fingers to straighten smoothly. The wound recovers quickly and there is no seams to be removed. It is a general outpatient surgery, but there is a risk of accidental injury and peripheral nerves by picking the wrong position. Traditional procedures require an incision in the affected area and incision of the tendon sheath, which is the most common form of surgery due to the minimal risk. After surgery, the doctor often reminds the patient to move the finger joint frequently to avoid sticky joints and affect movement.