Hyperextension describes a sprained thumb ligament caused by backwards motion, away from the inside of the palm. Understanding your sprain begins with knowing the difference between the two categories. Sprained thumb joints come in two broad categories, each with their own symptoms and causes. The most common ligament to sprain is the ulnar collateral ligament that provides lateral stability to the middle joint. These three joints include the carpometacarpal joint (where your wrist and thumb meet), the metacarpophalangeal joint (the knobbiest part of the thumb), and the interphalangeal joint (the last joint in the thumb). What is a Sprained Thumb?Ī sprained thumb is defined as damage to the ligaments (and potentially surrounding connective tissue) to one or more of the three joints in the thumb. Use this guide to learn more about thumb sprains and their causes and symptoms. The good news is there are many effective at-home and professional treatments, depending on the severity of your sprain. Besides the loss of functionality, the pain and stiffness put a definite damper on daily life. If you're suffering from a sprained thumb, you know how important that first digit really is. Without our thumbs, performing everyday tasks like typing, texting, and grasping objects would quickly become a nightmare.
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