Trigger finger is that snapping condition that occurs to any digit of the hand when you open or close the hand. In medical terms trigger finger is known as stenosing tenosynovitis. There are a number of symptoms of trigger finger and they develop when either the middle, ring, or index fingers attempts to contract close while gripping. Instead of having a smooth continuous closure, the digit stutters and then snaps closed. When you experience such finger closure, you will feel some pain particularly at the base of the digit on the palm of the hand. This is why trigger finger is known to affect the hand.

Trigger finger is caused by inflammation and swelling or scarring around the tendons and this normally pulls the affected finger towards the inside of the palm. In most cases, trigger finger occurs as an isolated condition and in some cases it is as a result of inflammation of tissues of the hand like the rheumatoid arthritis.