You might also be looking for the Tarellian plague.

The Terrellian plague was a devastating viral infection, renowned for the excruciating discomfort its victims suffered.

The first symptoms of Terrellian plague was a minor headache; shortly later the symptoms became much, much worse. (ENT: "Singularity")

It is often used in hyperbole or as an exaggerating comparative: "It's heartburn, Neelix, not the Terrellian plague." (VOY: "Message in a Bottle")

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