Thanks for you query, albeit small and specific.
The causes of the numbness of the bottom lip after UGI Endoscopy are:
- The topical anesthesia still is working on the lower lip.
-It is possible that the instrument through which the endoscope passes make a trauma at the base of the lip casing neuropraxia.
In a normal course this is fully reversible, nothing much to worry about.
Hope this helps.
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