Tendons connect the muscles to bones. They are covered by a slick lining or sheath. In the forearm, these tendons connect the muscles with the bones of the fingers. When you bend your fingers, the tendons glide back and forth. When the tendon sheath becomes inflamed, it swells and may develop a thickened area or knot. The tendon can pass through its sheath when bending a finger, but gets stuck as the finger straightens. This causes further irritation and results in a vicious circle of irritation, swelling and catching. Eventually, the finger locks in a bent position.
Causes of Trigger Finger
The exact cause for the development of a trigger finger is not known. However, it arises due to inflammation between the tendon and its overlying sheath.
Signs and Symptoms of Trigger Finger
Individuals who develop a trigger finger will have the classical inability to straighten out a flexed finger. The finger may be swollen and there may be a bump, or nodule, over the joint in the palm of the hand. The finger may be stiff and painful.
advertisement
Find more information
Advertisement
Medical Content Last Updated on 07/12/2008
Disclaimer
The information contained on this site is for the sole purpose of
being informative. This information is not and should not be used or relied upon as medical
advice. Always seek the advice of your physician, nurse
Or other qualified health care provider before you undergo any treatment or
for answers to any questions you may have regarding a medical condition.
If you believe you have a medical emergency, please discontinue use
of MyElectronicMD and call 911 now.
Nothing contained on or provided through the service is intended to be or is
to be used for medical diagnosis or treatment.
Your use of this site is subject to certain terms and conditions.
