The causes of nose twitching can be silly and severe. Some of those causes include the fact that some people are able to twitch their noses just for fun. Other nose twitching causes might include motor disorders or tics that are caused by diseases like Parkinson’s disease, allergies, exposure to too much caffeine or other drugs that cause a gain in heart rate, transient tic disorder, and Tourette’s syndrome. Nose twitching that is voluntary is quite rare. Some people practice using those facial muscles just to create nose twitches.

Reference:

www.webmd.com

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Resource:

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