Anxiety can be described as a sensation of unease or “worry”. It may be about something precise or it may be imprecise in nature. A certain amount of anxiety is normal and helps to get better our performance and let people avoid dangerous situations. This usually lasts for a short period causing no impairment in social or occupational functioning. When this anxiety is extended and affects social or occupational functioning, it's unusual and accounts for anxiety "disorder".

Patients often experience a state of intense uneasiness, improbability, and fear resulting from the anticipation of a threatening incident or state, often to a degree that normal physical and brainpower functioning is disturb. This may be precipitated due to several causes which are simply identified by the patient himself. The anxiety is to a greater degree than just daily worries and patients do talk about that they are not able to manage these worries. They are often accompanying with physical symptoms as well. These symptoms have to present for most days at least for several weeks at a time.