It's easy to think that a shaking hand could be a sign of Parkinson's disease. But it's more likely essential tremor, an ailment that's not... Involuntary Shaking Can Be Caused By Essential Tremors ...

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Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary contractions of a muscle, muscle spasms and muscle twitching aren't ...

There is something strangely unsettling about an eye that refuses to stay still. It starts as a tiny flutter near the eyelid.

‌Hemifacial spasm is a disorder of the nerves and muscles that causes nonpainful involuntary twitching on one side of the face. Many people refer to hemifacial spasms as lip muscle spasms. Hemifacial ...

This story is free to read because readers choose to support LAist. If you find value in independent local reporting, make a donation to power our newsroom today. Listen 4:01 Katharine Hepburn had it.

Katharine Hepburn had it. So did playwright Eugene O'Neill and Sen. Robert Byrd. Essential tremor is a condition that causes involuntary shaking. While it usually develops in middle age, it can start ...