Feelings of dread or worry, often accompanied by physical signs of arousal, which are a normal reaction to stress. Excessive anxiety with no obvious source, however, may point to an anxiety disorder.
Example: A patient anticipating surgery complains of palpitations, shortness of breath, nausea, diarrhea, and sweating spells.
Grinnell, R. (2018). Anxiety. Psych Central. Retrieved on January 14, 2018, from https://psychcentral.com/encyclopedia/anxiety/