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Jumping-to-Conclusions Diagnosis

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He'll die in a few minutes without treatment!!!
Telly: "Knock knock."
Miles: "Who's there?"
Telly: "Atch."
Miles: "Atch who?"
Telly: "So sorry you're sneezing. I hope you don't have a cold."

A character sneezes once, says they feel a bit funny, or coughs once—and everyone else thinks that character is sick. The character does not show any illness signs except that one sneeze or cough (which in reality is not a biggie), but nevertheless the other characters put him/her in bed, or they have to miss something fun or important or both. Often at the end of the episode another character "catches" the false illness by sneezing once. And if there is an actual Sick Episode, at the end this trope often ensues in a second character, especially with coughing or sneezing. Perfect Health (where the characters never sneeze, cough etc unless they are sick) is a similar trope but in this one, the character shows no other symptoms over the course of the episode and therefore most likely is not sick.

All examples of this trope are when a character is assumed sick by one little "glitch", but doesn't show any other symptoms. Any instances where they do show any other symptoms over the course of the episode (fever, persistent unidentified cough, severe headache, wheezing etc) are Not an Example.

Compare Logical Fallacies, Perfect Health, and O.O.C. Is Serious Business (if that glitch was somehow out of character). Contrast Deadly Nosebleed, Incurable Cough of Death (when it seems like this trope but turns out to actually be an illness) and Definitely Just a Cold. Also compare Victorian Novel Disease (except the victims of this often are genuinely sick) and Hypochondria (when someone does one of these on themselves).


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    Anime & Manga 
  • One episode of Lost Universe has the crew of the Swordbreaker sent to restore order to a medical school with insanely overcompetitive students trying to outdo or sabotage each other. At one point Milly sneezes once, and promptly gets swarmed by students trying to diagnose and treat her condition. Milly ends up totally covered in bandages, which would suggest that the students weren't ready for finals at all, as illnesses generally don't require bandaging.

    Films — Animated 

    Films — Live-Action 

    Live-Action TV 
  • Clarissa Explains It All:
    • In "Sick Days," Clarissa just sneezes once, then opens the window because she feels hot, and right away her mother insists on taking her temperature and finds that she has a fever. Despite the rest of the episode being a Sick Episode, occasional sneezes are the only real symptoms she shows.
    • Near the end of "The Flu," Clarissa realizes just from sneezing twice that she's caught the flu from her parents. Averted with the parents at the beginning, though, who can't stop sneezing and are exhausted, shivering and feverish.
  • My Left Nut: Mick becomes convinced he has testicular cancer after the first few exams and thinks his days are numbered, which causes a great negative impact on his social life.
  • Sesame Street: Madlenka is thought to have a cold but in reality she only sneezed once. Also Telly's joke "Knock Knock", "Who's There?'' "Atch" "Atch who?" "Sorry you're sneezing. Have you got a cold?"
  • Star Trek: The Next Generation: When Data is practicing sneezing, Wesley Crusher asks if he has a cold. Which is strange as Data is an android and colds do not exist in the 24th Century.


    Western Animation 


Video Example(s):


Issue, Not Achoo

Winnie the Pooh and Eeyore assume Owl must be catching a cold solely because of sneezing... and he's not even actually sneezing!

How well does it match the trope?

4.4 (5 votes)

Example of:

Main / JumpingToConclusionsDiagnosis

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