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Why Is My Thumb Muscle Twitching? Causes, When to Worry, and Fast Relief Tips

"Have you ever been sitting at your desk or holding your phone when suddenly, the meaty part of your thumb begins to jump and pulse on its own? It is a distracting, often unsettling sensation that feels like a tiny heartbeat under your skin. While it might seem like a minor annoyance, the persistence of these involuntary movements often leads many to wonder: why is my thumb muscle twitching and is it a sign of something more serious?Muscle twitching, known medically as fasciculation, is incredibly common and usually harmless. However, when it happens in the thumb, it can interfere with your ability to type, write, or perform fine motor tasks...."

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