Know What is stiff person syndrome? 

Stiff man or woman syndrome is characterized by muscle tension and spasms

 increased sensitivity to stimuli, including sound and light, and emotional distress that can cause muscle spasms,

according to the National Institute of Neurological Diseases and Stroke.

“It is often associated with muscle spasms, which can be quite severe

 These can cause falls, severe pain and great disability,” said Dr. Emile Sami Moukheiber

“Falls from intense spasms are not unusual. Those spasms can be induced by startles, excessive emotions, bloodless weather.”

Those spasms can be strong enough to fracture a bone, and any fall can cause excessive damage.

Dion said in her video that the spasms affect "every aspect" of her daily life

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