What Is Facial Spasm?

Hemifacial spasm, also known as truncular spasm (tricial myasthenia) is a contraction or twitching of facial muscles on one side of your face. Hemifacial spasms are more common in people with diabetes, in whom the muscles may become overactive. The cause is unknown, although medications, surgery, and Botox treatments have been used to control and...

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