Gas pain
Gas pain was abdomenal discomfort caused by the accumulation of gas in one's digestive system. 

In 2377, while trying to determine where The Doctor was being detained, Neelix
served Gar a meal whose  was Talaxian wormroot. Upon hearing this, Tuvok
asked if Neelix had poisoned Gar. Neelix assured the Vulcan that Gar was only having gas pains. ()

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Medical conditions