Panic disorder

Panic Disorder is a psychiatric condition characterized by recurring panic attacks in combination with significant behavioral change or at least a month of ongoing worry about the implications or concern about having other attacks.
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A panic attack is a sudden, intense experience of fear coupled with an overwhelming feeling of danger, accompanied by [more]Panic disorder - Community and Resources

Noun
1. an anxiety disorder characterized by unpredictable panic attacks; the attacks are usually severe but brief
(hypernym) anxiety disorder

Symptoms of panic attack usually begin abruptly and include rapid heartbeat, chest sensations, shortness of breath, dizziness, tingling, and anxiousness. Treatments include several medications and psychotherapy.