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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Thumb Twitching?

Hi, I have been having a twitch on my left thumb on and off for 3 months or so. I am a dental hygienist but I am right handed. I feel a little week on my left hand. It s starting to weird me out. I did separate my left shoulder a month ago too. Any thoughts?
posted on Mon, 28 Jul 2014
Twitter Sun, 12 Apr 2015 Answered on
Twitter Mon, 13 Apr 2015 Last reviewed on
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Orthopaedic Surgeon, Joint Replacement,  's  Response
Hi,
Thanks for your query.
It seems that you have muscle twitches or fasciculations. These are small, local, involuntary muscle contraction and relaxation visible under the skin arising from the spontaneous discharge of a bundle of skeletal muscle fibers.
You might consult your doctor who can order
1. a few blood tests including thyroid function tests,
2. Serum electrolytes including Serum calcium and potassium levels.
3. Serum B12 levels

In case the above tests are normal further testing can be done including - nerveconduction studies, Electromyography, etc. These tests might help to diagnose any underlying neurological issues.

I do hope that you have found something helpful and I will be glad to answer any further query.
Take care
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What Causes Thumb Twitching?

Hi, Thanks for your query. It seems that you have muscle twitches or fasciculations. These are small, local, involuntary muscle contraction and relaxation visible under the skin arising from the spontaneous discharge of a bundle of skeletal muscle fibers. You might consult your doctor who can order 1. a few blood tests including thyroid function tests, 2. Serum electrolytes including Serum calcium and potassium levels. 3. Serum B12 levels In case the above tests are normal further testing can be done including - nerveconduction studies, Electromyography, etc. These tests might help to diagnose any underlying neurological issues. I do hope that you have found something helpful and I will be glad to answer any further query. Take care