People get sick, catch diseases, get infected by pathogens, and just have moments when they don’t feel well. For the most part, there can be any number of reasons for this sort of thing to be real. Viruses, bacteria, neurological agents, chemical imbalances in the body, and over-straining the body both physically and mentally can all be named causes. It is therefore natural that people feel apprehension and anxiety when faced with the thought of disease and sickness. However, to allow oneself to be so caught up in the possibility of getting sick, to the point that even the slightest changes in the body are interpreted as an illness, is an illness in itself.
Hypochondria is a disorder that is characterized by excessive anxiety over the possibility of illness, usually with a specific illness in mind. This problem can also cause someone to consult with multiple doctors, switching from one to another. Such behavior can sometimes stem from the belief that the hypochondriac has contracted an illness, interpreting even minutiae as symptoms. However, the reality is that the body has not contracted an illness, so no doctor would be able to find the signs of the disease...