Nickie has been experiencing frequent periods of anxiety and occasional attacks of rapid breathing, increased heart rate, sweating, and trembling. Her doctor diagnosed her with .

panic disorder

Explanation:

In simple words, A panic attack refers to the sudden sensation of deep discomfort or uneasiness that peaks in seconds. It contains both neurological as well as psychological emotional symptoms, or behavioural signals.

Panic disorder relates to frequent, sudden severe anxiety accompanied by at least 1 third of:  Constant anxiety for another traumatic event or the consequences of a panic attack or   Major changes in actions in conjunction with incidents (e.g. refusing activity or locations for anticipation of traumatic event).

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