Terrellian plague
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 symptom of Terrellian plague was a minor headache; shortly after the symptoms became much, much worse. ()

In the anti-time future (c. 2395), experienced by Captain Jean-Luc Picard, the Terrellian plague had spread to Romulus. Only a few medical ships were allowed to enter to treat the victims. ()

It was often used in hyperbole or as an exaggerating comparative: "It's heartburn, not the Terrellian plague." ()

Medical conditions