Stenosing tenosynovitis, also known as trigger finger, is a condition characterized by the inflammation of the tendons and synovial sheaths in the fingers. The condition causes a painful locking or catching sensation in the affected finger. Several synonyms describe stenosing tenosynovitis, including trigger digit, diathroses stenosing tenosynovitis, flexor tenosynovitis, and tenosynovitis with stenosing. Other less commonly used synonyms include digitally induced stenosing tenosynovitis and stenosing tendovaginitis. While these terms may vary in their specificity, they all refer to the same condition that affects the hand's ability to move freely and cause significant discomfort and inconvenience to sufferers.