Hypochondria

Hypochondria or health anxiety is an obsession with the idea of having a serious but undiagnosed medical condition. This debilitating condition is the result of an inaccurate perception of the condition of body or mind despite the absence of an actual medical condition.

Mainstream Smurfs Media
In the Smurfs comic books, Sneezy or Chilly is the Smurf who is considered a hypochondriac, always believing himself to come down with some sort of illness. Papa Smurf usually tries to treat this with a placebo such as vegetable broth, believing that the symptoms are merely psychosomatic, but a Smurf who becomes Doctor Smurf tries to treat these conditions with actual remedies, only for the remedies to not work.