Twitching: Such localized twitching is most often a nonserious irritable nerve or muscle or a result of an overuse of the finger. If it persists, avoid caffeine but if it (and/or other areas twitch ) continues for a more prolonged time, possible causes are deficiencies of calcium, magnesium or an electrolyte imbalance. A neurologist would be best to evaluate and advise you.
Answered 5/20/2020
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