Why do my thumbs click audibly when I bend them completely backwards stretching?
1. Introduction Thumbs click audibly when bent completely backward due to the sudden mechanical snapping of the flexor or extensor tendons slipping over the bony ridges of the metacarpophalangeal joint, or due to rapid fluid cavitation within the joint capsule. When forced into hyperextension, the complex ligamentous structure of the thumb is stretched to its … Read more