Cramps
From Memory Alpha, the free Star Trek reference
Cramps were a mild condition wherein muscles involuntarily contracted, cramps were accompanied by unpleasantness and was often the result of stress or strain on the muscle in question. This muscle could also be part of autonomous muscle system, such as the stomach.
When trying to get in to a secure section of San Francisco Mercy hospital, Doctor Leonard McCoy baffled a security guard by describing doctor Gillian Taylor's condition as immediate post-prandal upper-abdominal distension, which he later described to Admiral Kirk as the medical description of cramps. (Star Trek IV: The Voyage Home)
While on board the USS Prometheus in 2374, The Doctor told the Romulans in control of the vessel that the Terothka virus they supposedly were exposed to might give them unbearable stomach cramps. (VOY: "Message in a Bottle")
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