Main Page | See live article | Alphabetical index Trigger finger (or thumb) is the name of the condition when the sheath around a tendon becomes swollen and restricts movement of the tendon in the finger, making it painful to straighten after bent. It is a type of Stenosing Tenosynovitis. The affected finger can make a soft crackling sound when moved. This ailment is sometimes classed as a repetitive strain injury. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.