In Korean tradition, dreaming of falling ill is read as mixed. It is most often tied to 건강.
Falling ill may be the body's own signal, but tradition often read sickness-then-recovery as misfortune spent. Another falling ill, look to that person.
Tradition reads the symbol as an omen; psychology reads the same dream as a mirror of your present state. Describe your dream and both readings appear together. Interpret your dream